double letter_l[] = {
-0.105263, -0.207440,
-0.108182, 0.173937,
-0.109280, 0.299948,
-0.109283, 0.340490,
-0.105907, 0.372182,
-0.104059, 0.380107,
-0.091231, 0.409253,
-0.069112, 0.431754,
-0.039130, 0.446449,
-0.005093, 0.454614,
0.029018, 0.457917,
0.060424, 0.457140,
0.087614, 0.452122,
0.110104, 0.442246,
0.127851, 0.427662,
0.141076, 0.409636,
0.150263, 0.390488,
0.156066, 0.372701,
0.159670, 0.354752,
0.160219, 0.303937,
0.160569, 0.152952,
0.160810, 0.034914,
0.160790, -0.095764,
0.160217, -0.214607,
0.158889, -0.304397,
0.156737, -0.360039,
0.150208, -0.401271,
0.124974, -0.427020,
0.078909, -0.447270,
0.052876, -0.452784,
0.038706, -0.454157,
-0.024785, -0.446256,
-0.075312, -0.415388,
-0.091657, -0.396699,
-0.103874, -0.371529,
};