/**
 * Table mapping most combined Latin, Greek, and Cyrillic characters
 * to their base characters.  If c is in range, BASE_CHARS[c] == c
 * if c is not a combined character, or the base character if it
 * is combined.
 */
static unsigned short BASE_CHARS[] = {
    0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
    0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
    0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
    0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
    0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
    0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
    0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
    0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
    0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
    0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
    0x0020, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
    0x0020, 0x00a9, 0x0061, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x0020,
    0x00b0, 0x00b1, 0x0032, 0x0033, 0x0020, 0x03bc, 0x00b6, 0x00b7,
    0x0020, 0x0031, 0x006f, 0x00bb, 0x0031, 0x0031, 0x0033, 0x00bf,
    0x0041, 0x0041, 0x0041, 0x0041, 0x0041, 0x0041, 0x00c6, 0x0043,
    0x0045, 0x0045, 0x0045, 0x0045, 0x0049, 0x0049, 0x0049, 0x0049,
    0x00d0, 0x004e, 0x004f, 0x004f, 0x004f, 0x004f, 0x004f, 0x00d7,
    0x004f, 0x0055, 0x0055, 0x0055, 0x0055, 0x0059, 0x00de, 0x0073, // Manually changed d8 to 4f
                                                                    // Manually changed df to 73
    0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x00e6, 0x0063,
    0x0065, 0x0065, 0x0065, 0x0065, 0x0069, 0x0069, 0x0069, 0x0069,
    0x00f0, 0x006e, 0x006f, 0x006f, 0x006f, 0x006f, 0x006f, 0x00f7,
    0x006f, 0x0075, 0x0075, 0x0075, 0x0075, 0x0079, 0x00fe, 0x0079, // Manually changed f8 to 6f
    0x0041, 0x0061, 0x0041, 0x0061, 0x0041, 0x0061, 0x0043, 0x0063,
    0x0043, 0x0063, 0x0043, 0x0063, 0x0043, 0x0063, 0x0044, 0x0064,
    0x0110, 0x0111, 0x0045, 0x0065, 0x0045, 0x0065, 0x0045, 0x0065,
    0x0045, 0x0065, 0x0045, 0x0065, 0x0047, 0x0067, 0x0047, 0x0067,
    0x0047, 0x0067, 0x0047, 0x0067, 0x0048, 0x0068, 0x0126, 0x0127,
    0x0049, 0x0069, 0x0049, 0x0069, 0x0049, 0x0069, 0x0049, 0x0069,
    0x0049, 0x0131, 0x0049, 0x0069, 0x004a, 0x006a, 0x004b, 0x006b,
    0x0138, 0x004c, 0x006c, 0x004c, 0x006c, 0x004c, 0x006c, 0x004c,
    0x006c, 0x0141, 0x0142, 0x004e, 0x006e, 0x004e, 0x006e, 0x004e,
    0x006e, 0x02bc, 0x014a, 0x014b, 0x004f, 0x006f, 0x004f, 0x006f,
    0x004f, 0x006f, 0x0152, 0x0153, 0x0052, 0x0072, 0x0052, 0x0072,
    0x0052, 0x0072, 0x0053, 0x0073, 0x0053, 0x0073, 0x0053, 0x0073,
    0x0053, 0x0073, 0x0054, 0x0074, 0x0054, 0x0074, 0x0166, 0x0167,
    0x0055, 0x0075, 0x0055, 0x0075, 0x0055, 0x0075, 0x0055, 0x0075,
    0x0055, 0x0075, 0x0055, 0x0075, 0x0057, 0x0077, 0x0059, 0x0079,
    0x0059, 0x005a, 0x007a, 0x005a, 0x007a, 0x005a, 0x007a, 0x0073,
    0x0180, 0x0181, 0x0182, 0x0183, 0x0184, 0x0185, 0x0186, 0x0187,
    0x0188, 0x0189, 0x018a, 0x018b, 0x018c, 0x018d, 0x018e, 0x018f,
    0x0190, 0x0191, 0x0192, 0x0193, 0x0194, 0x0195, 0x0196, 0x0197,
    0x0198, 0x0199, 0x019a, 0x019b, 0x019c, 0x019d, 0x019e, 0x019f,
    0x004f, 0x006f, 0x01a2, 0x01a3, 0x01a4, 0x01a5, 0x01a6, 0x01a7,
    0x01a8, 0x01a9, 0x01aa, 0x01ab, 0x01ac, 0x01ad, 0x01ae, 0x0055,
    0x0075, 0x01b1, 0x01b2, 0x01b3, 0x01b4, 0x01b5, 0x01b6, 0x01b7,
    0x01b8, 0x01b9, 0x01ba, 0x01bb, 0x01bc, 0x01bd, 0x01be, 0x01bf,
    0x01c0, 0x01c1, 0x01c2, 0x01c3, 0x0044, 0x0044, 0x0064, 0x004c,
    0x004c, 0x006c, 0x004e, 0x004e, 0x006e, 0x0041, 0x0061, 0x0049,
    0x0069, 0x004f, 0x006f, 0x0055, 0x0075, 0x00dc, 0x00fc, 0x00dc,
    0x00fc, 0x00dc, 0x00fc, 0x00dc, 0x00fc, 0x01dd, 0x00c4, 0x00e4,
    0x0226, 0x0227, 0x00c6, 0x00e6, 0x01e4, 0x01e5, 0x0047, 0x0067,
    0x004b, 0x006b, 0x004f, 0x006f, 0x01ea, 0x01eb, 0x01b7, 0x0292,
    0x006a, 0x0044, 0x0044, 0x0064, 0x0047, 0x0067, 0x01f6, 0x01f7,
    0x004e, 0x006e, 0x00c5, 0x00e5, 0x00c6, 0x00e6, 0x00d8, 0x00f8,
    0x0041, 0x0061, 0x0041, 0x0061, 0x0045, 0x0065, 0x0045, 0x0065,
    0x0049, 0x0069, 0x0049, 0x0069, 0x004f, 0x006f, 0x004f, 0x006f,
    0x0052, 0x0072, 0x0052, 0x0072, 0x0055, 0x0075, 0x0055, 0x0075,
    0x0053, 0x0073, 0x0054, 0x0074, 0x021c, 0x021d, 0x0048, 0x0068,
    0x0220, 0x0221, 0x0222, 0x0223, 0x0224, 0x0225, 0x0041, 0x0061,
    0x0045, 0x0065, 0x00d6, 0x00f6, 0x00d5, 0x00f5, 0x004f, 0x006f,
    0x022e, 0x022f, 0x0059, 0x0079, 0x0234, 0x0235, 0x0236, 0x0237,
    0x0238, 0x0239, 0x023a, 0x023b, 0x023c, 0x023d, 0x023e, 0x023f,
    0x0240, 0x0241, 0x0242, 0x0243, 0x0244, 0x0245, 0x0246, 0x0247,
    0x0248, 0x0249, 0x024a, 0x024b, 0x024c, 0x024d, 0x024e, 0x024f,
    0x0250, 0x0251, 0x0252, 0x0253, 0x0254, 0x0255, 0x0256, 0x0257,
    0x0258, 0x0259, 0x025a, 0x025b, 0x025c, 0x025d, 0x025e, 0x025f,
    0x0260, 0x0261, 0x0262, 0x0263, 0x0264, 0x0265, 0x0266, 0x0267,
    0x0268, 0x0269, 0x026a, 0x026b, 0x026c, 0x026d, 0x026e, 0x026f,
    0x0270, 0x0271, 0x0272, 0x0273, 0x0274, 0x0275, 0x0276, 0x0277,
    0x0278, 0x0279, 0x027a, 0x027b, 0x027c, 0x027d, 0x027e, 0x027f,
    0x0280, 0x0281, 0x0282, 0x0283, 0x0284, 0x0285, 0x0286, 0x0287,
    0x0288, 0x0289, 0x028a, 0x028b, 0x028c, 0x028d, 0x028e, 0x028f,
    0x0290, 0x0291, 0x0292, 0x0293, 0x0294, 0x0295, 0x0296, 0x0297,
    0x0298, 0x0299, 0x029a, 0x029b, 0x029c, 0x029d, 0x029e, 0x029f,
    0x02a0, 0x02a1, 0x02a2, 0x02a3, 0x02a4, 0x02a5, 0x02a6, 0x02a7,
    0x02a8, 0x02a9, 0x02aa, 0x02ab, 0x02ac, 0x02ad, 0x02ae, 0x02af,
    0x0068, 0x0266, 0x006a, 0x0072, 0x0279, 0x027b, 0x0281, 0x0077,
    0x0079, 0x02b9, 0x02ba, 0x02bb, 0x02bc, 0x02bd, 0x02be, 0x02bf,
    0x02c0, 0x02c1, 0x02c2, 0x02c3, 0x02c4, 0x02c5, 0x02c6, 0x02c7,
    0x02c8, 0x02c9, 0x02ca, 0x02cb, 0x02cc, 0x02cd, 0x02ce, 0x02cf,
    0x02d0, 0x02d1, 0x02d2, 0x02d3, 0x02d4, 0x02d5, 0x02d6, 0x02d7,
    0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x02de, 0x02df,
    0x0263, 0x006c, 0x0073, 0x0078, 0x0295, 0x02e5, 0x02e6, 0x02e7,
    0x02e8, 0x02e9, 0x02ea, 0x02eb, 0x02ec, 0x02ed, 0x02ee, 0x02ef,
    0x02f0, 0x02f1, 0x02f2, 0x02f3, 0x02f4, 0x02f5, 0x02f6, 0x02f7,
    0x02f8, 0x02f9, 0x02fa, 0x02fb, 0x02fc, 0x02fd, 0x02fe, 0x02ff,
    0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307,
    0x0308, 0x0309, 0x030a, 0x030b, 0x030c, 0x030d, 0x030e, 0x030f,
    0x0310, 0x0311, 0x0312, 0x0313, 0x0314, 0x0315, 0x0316, 0x0317,
    0x0318, 0x0319, 0x031a, 0x031b, 0x031c, 0x031d, 0x031e, 0x031f,
    0x0320, 0x0321, 0x0322, 0x0323, 0x0324, 0x0325, 0x0326, 0x0327,
    0x0328, 0x0329, 0x032a, 0x032b, 0x032c, 0x032d, 0x032e, 0x032f,
    0x0330, 0x0331, 0x0332, 0x0333, 0x0334, 0x0335, 0x0336, 0x0337,
    0x0338, 0x0339, 0x033a, 0x033b, 0x033c, 0x033d, 0x033e, 0x033f,
    0x0300, 0x0301, 0x0342, 0x0313, 0x0308, 0x0345, 0x0346, 0x0347,
    0x0348, 0x0349, 0x034a, 0x034b, 0x034c, 0x034d, 0x034e, 0x034f,
    0x0350, 0x0351, 0x0352, 0x0353, 0x0354, 0x0355, 0x0356, 0x0357,
    0x0358, 0x0359, 0x035a, 0x035b, 0x035c, 0x035d, 0x035e, 0x035f,
    0x0360, 0x0361, 0x0362, 0x0363, 0x0364, 0x0365, 0x0366, 0x0367,
    0x0368, 0x0369, 0x036a, 0x036b, 0x036c, 0x036d, 0x036e, 0x036f,
    0x0370, 0x0371, 0x0372, 0x0373, 0x02b9, 0x0375, 0x0376, 0x0377,
    0x0378, 0x0379, 0x0020, 0x037b, 0x037c, 0x037d, 0x003b, 0x037f,
    0x0380, 0x0381, 0x0382, 0x0383, 0x0020, 0x00a8, 0x0391, 0x00b7,
    0x0395, 0x0397, 0x0399, 0x038b, 0x039f, 0x038d, 0x03a5, 0x03a9,
    0x03ca, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397,
    0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f,
    0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
    0x03a8, 0x03a9, 0x0399, 0x03a5, 0x03b1, 0x03b5, 0x03b7, 0x03b9,
    0x03cb, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
    0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
    0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6, 0x03c7,
    0x03c8, 0x03c9, 0x03b9, 0x03c5, 0x03bf, 0x03c5, 0x03c9, 0x03cf,
    0x03b2, 0x03b8, 0x03a5, 0x03d2, 0x03d2, 0x03c6, 0x03c0, 0x03d7,
    0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
    0x03e0, 0x03e1, 0x03e2, 0x03e3, 0x03e4, 0x03e5, 0x03e6, 0x03e7,
    0x03e8, 0x03e9, 0x03ea, 0x03eb, 0x03ec, 0x03ed, 0x03ee, 0x03ef,
    0x03ba, 0x03c1, 0x03c2, 0x03f3, 0x0398, 0x03b5, 0x03f6, 0x03f7,
    0x03f8, 0x03a3, 0x03fa, 0x03fb, 0x03fc, 0x03fd, 0x03fe, 0x03ff,
    0x0415, 0x0415, 0x0402, 0x0413, 0x0404, 0x0405, 0x0406, 0x0406,
    0x0408, 0x0409, 0x040a, 0x040b, 0x041a, 0x0418, 0x0423, 0x040f,
    0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417,
    0x0418, 0x0418, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e, 0x041f,
    0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427,
    0x0428, 0x0429, 0x042a, 0x042b, 0x042c, 0x042d, 0x042e, 0x042f,
    0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
    0x0438, 0x0438, 0x043a, 0x043b, 0x043c, 0x043d, 0x043e, 0x043f,
    0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
    0x0448, 0x0449, 0x044a, 0x044b, 0x044c, 0x044d, 0x044e, 0x044f,
    0x0435, 0x0435, 0x0452, 0x0433, 0x0454, 0x0455, 0x0456, 0x0456,
    0x0458, 0x0459, 0x045a, 0x045b, 0x043a, 0x0438, 0x0443, 0x045f,
    0x0460, 0x0461, 0x0462, 0x0463, 0x0464, 0x0465, 0x0466, 0x0467,
    0x0468, 0x0469, 0x046a, 0x046b, 0x046c, 0x046d, 0x046e, 0x046f,
    0x0470, 0x0471, 0x0472, 0x0473, 0x0474, 0x0475, 0x0474, 0x0475,
    0x0478, 0x0479, 0x047a, 0x047b, 0x047c, 0x047d, 0x047e, 0x047f,
    0x0480, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487,
    0x0488, 0x0489, 0x048a, 0x048b, 0x048c, 0x048d, 0x048e, 0x048f,
    0x0490, 0x0491, 0x0492, 0x0493, 0x0494, 0x0495, 0x0496, 0x0497,
    0x0498, 0x0499, 0x049a, 0x049b, 0x049c, 0x049d, 0x049e, 0x049f,
    0x04a0, 0x04a1, 0x04a2, 0x04a3, 0x04a4, 0x04a5, 0x04a6, 0x04a7,
    0x04a8, 0x04a9, 0x04aa, 0x04ab, 0x04ac, 0x04ad, 0x04ae, 0x04af,
    0x04b0, 0x04b1, 0x04b2, 0x04b3, 0x04b4, 0x04b5, 0x04b6, 0x04b7,
    0x04b8, 0x04b9, 0x04ba, 0x04bb, 0x04bc, 0x04bd, 0x04be, 0x04bf,
    0x04c0, 0x0416, 0x0436, 0x04c3, 0x04c4, 0x04c5, 0x04c6, 0x04c7,
    0x04c8, 0x04c9, 0x04ca, 0x04cb, 0x04cc, 0x04cd, 0x04ce, 0x04cf,
    0x0410, 0x0430, 0x0410, 0x0430, 0x04d4, 0x04d5, 0x0415, 0x0435,
    0x04d8, 0x04d9, 0x04d8, 0x04d9, 0x0416, 0x0436, 0x0417, 0x0437,
    0x04e0, 0x04e1, 0x0418, 0x0438, 0x0418, 0x0438, 0x041e, 0x043e,
    0x04e8, 0x04e9, 0x04e8, 0x04e9, 0x042d, 0x044d, 0x0423, 0x0443,
    0x0423, 0x0443, 0x0423, 0x0443, 0x0427, 0x0447, 0x04f6, 0x04f7,
    0x042b, 0x044b, 0x04fa, 0x04fb, 0x04fc, 0x04fd, 0x04fe, 0x04ff,
};

// generated with:
// cat UnicodeData.txt | perl -e 'while (<>) { @foo = split(/;/); $foo[5] =~ s/<.*> //; $base[hex($foo[0])] = hex($foo[5]);} for ($i = 0; $i < 0x500; $i += 8) { for ($j = $i; $j < $i + 8; $j++) { printf("0x%04x, ", $base[$j] ? $base[$j] : $j)}; print "\n"; }'