static char _lowercase[] = {      
        -128, -127, -126, -125, -124, -123, -122, -121, 
        -120, -119, -118, -117, -116, -115, -114, -113, 
        -112, -111, -110, -109, -108, -107, -106, -105, 
        -104, -103, -102, -101, -100,  -99,  -98,  -97, 
         -96,  -95,  -94,  -93,  -92,  -91,  -90,  -89, 
         -88,  -87,  -86,  -85,  -84,  -83,  -82,  -81, 
         -80,  -79,  -78,  -77,  -76,  -75,  -74,  -73, 
         -72,  -71,  -70,  -69,  -68,  -67,  -66,  -65, 
         -64,  -63,  -62,  -61,  -60,  -59,  -58,  -57, 
         -56,  -55,  -54,  -53,  -52,  -51,  -50,  -49, 
         -48,  -47,  -46,  -45,  -44,  -43,  -42,  -41, 
         -40,  -39,  -38,  -37,  -36,  -35,  -34,  -33, 
         -32,  -31,  -30,  -29,  -28,  -27,  -26,  -25, 
         -24,  -23,  -22,  -21,  -20,  -19,  -18,  -17, 
         -16,  -15,  -14,  -13,  -12,  -11,  -10,   -9, 
          -8,   -7,   -6,   -5,   -4,   -3,   -2,   -1, 
           0,    1,    2,    3,    4,    5,    6,    7, 
           8,    9,   10,   11,   12,   13,   14,   15, 
          16,   17,   18,   19,   20,   21,   22,   23, 
          24,   25,   26,   27,   28,   29,   30,   31, 
          32,   33,   34,   35,   36,   37,   38,   39, 
          40,   41,   42,   43,   44,   45,   46,   47, 
          48,   49,   50,   51,   52,   53,   54,   55, 
          56,   57,   58,   59,   60,   61,   62,   63, 
          64,   97,   98,   99,  100,  101,  102,  103, 
         104,  105,  106,  107,  108,  109,  110,  111, 
         112,  113,  114,  115,  116,  117,  118,  119, 
         120,  121,  122,   91,   92,   93,   94,   95, 
          96,   97,   98,   99,  100,  101,  102,  103, 
         104,  105,  106,  107,  108,  109,  110,  111, 
         112,  113,  114,  115,  116,  117,  118,  119, 
         120,  121,  122,  123,  124,  125,  126,  127, 
         128,  129,  130,  131,  132,  133,  134,  135, 
         136,  137,  138,  139,  140,  141,  142,  143, 
         144,  145,  146,  147,  148,  149,  150,  151, 
         152,  153,  154,  155,  156,  157,  158,  159, 
         160,  161,  162,  163,  164,  165,  166,  167, 
         168,  169,  170,  171,  172,  173,  174,  175, 
         176,  177,  178,  179,  180,  181,  182,  183, 
         184,  185,  186,  187,  188,  189,  190,  191, 
         192,  193,  194,  195,  196,  197,  198,  199, 
         200,  201,  202,  203,  204,  205,  206,  207, 
         208,  209,  210,  211,  212,  213,  214,  215, 
         216,  217,  218,  219,  220,  221,  222,  223, 
         224,  225,  226,  227,  228,  229,  230,  231, 
         232,  233,  234,  235,  236,  237,  238,  239, 
         240,  241,  242,  243,  244,  245,  246,  247, 
         248,  249,  250,  251,  252,  253,  254,  255, 
};

static char _uppercase[] = {
        -128, -127, -126, -125, -124, -123, -122, -121, 
        -120, -119, -118, -117, -116, -115, -114, -113, 
        -112, -111, -110, -109, -108, -107, -106, -105, 
        -104, -103, -102, -101, -100,  -99,  -98,  -97, 
         -96,  -95,  -94,  -93,  -92,  -91,  -90,  -89, 
         -88,  -87,  -86,  -85,  -84,  -83,  -82,  -81, 
         -80,  -79,  -78,  -77,  -76,  -75,  -74,  -73, 
         -72,  -71,  -70,  -69,  -68,  -67,  -66,  -65, 
         -64,  -63,  -62,  -61,  -60,  -59,  -58,  -57, 
         -56,  -55,  -54,  -53,  -52,  -51,  -50,  -49, 
         -48,  -47,  -46,  -45,  -44,  -43,  -42,  -41, 
         -40,  -39,  -38,  -37,  -36,  -35,  -34,  -33, 
         -32,  -31,  -30,  -29,  -28,  -27,  -26,  -25, 
         -24,  -23,  -22,  -21,  -20,  -19,  -18,  -17, 
         -16,  -15,  -14,  -13,  -12,  -11,  -10,   -9, 
          -8,   -7,   -6,   -5,   -4,   -3,   -2,   -1, 
           0,    1,    2,    3,    4,    5,    6,    7, 
           8,    9,   10,   11,   12,   13,   14,   15, 
          16,   17,   18,   19,   20,   21,   22,   23, 
          24,   25,   26,   27,   28,   29,   30,   31, 
          32,   33,   34,   35,   36,   37,   38,   39, 
          40,   41,   42,   43,   44,   45,   46,   47, 
          48,   49,   50,   51,   52,   53,   54,   55, 
          56,   57,   58,   59,   60,   61,   62,   63, 
          64,   65,   66,   67,   68,   69,   70,   71, 
          72,   73,   74,   75,   76,   77,   78,   79, 
          80,   81,   82,   83,   84,   85,   86,   87, 
          88,   89,   90,   91,   92,   93,   94,   95, 
          96,   65,   66,   67,   68,   69,   70,   71, 
          72,   73,   74,   75,   76,   77,   78,   79, 
          80,   81,   82,   83,   84,   85,   86,   87, 
          88,   89,   90,  123,  124,  125,  126,  127, 
         128,  129,  130,  131,  132,  133,  134,  135, 
         136,  137,  138,  139,  140,  141,  142,  143, 
         144,  145,  146,  147,  148,  149,  150,  151, 
         152,  153,  154,  155,  156,  157,  158,  159, 
         160,  161,  162,  163,  164,  165,  166,  167, 
         168,  169,  170,  171,  172,  173,  174,  175, 
         176,  177,  178,  179,  180,  181,  182,  183, 
         184,  185,  186,  187,  188,  189,  190,  191, 
         192,  193,  194,  195,  196,  197,  198,  199, 
         200,  201,  202,  203,  204,  205,  206,  207, 
         208,  209,  210,  211,  212,  213,  214,  215, 
         216,  217,  218,  219,  220,  221,  222,  223, 
         224,  225,  226,  227,  228,  229,  230,  231, 
         232,  233,  234,  235,  236,  237,  238,  239, 
         240,  241,  242,  243,  244,  245,  246,  247, 
         248,  249,  250,  251,  252,  253,  254,  255, 
};

char *lowercase = _lowercase + 128;
char *uppercase = _uppercase + 128;