double letter_d0[] = {
0.131136, -0.445716,
0.210390, -0.423237,
0.262577, -0.399065,
0.303066, -0.375918,
0.337334, -0.354157,
0.351012, -0.340831,
0.375016, -0.322534,
0.396490, -0.293488,
0.416732, -0.270408,
0.434497, -0.237234,
0.201921, 0.161833,
0.184565, 0.165839,
0.162353, 0.175720,
0.127279, 0.187103,
0.077452, 0.195250,
0.014636, 0.197297,
-0.055010, 0.192870,
-0.121485, 0.183899,
-0.176149, 0.172829,
-0.216299, 0.161038,
-0.245481, 0.148720,
-0.271343, 0.135014,
-0.299749, 0.118339,
-0.333036, 0.096502,
-0.370072, 0.066624,
-0.407117, 0.024452,
-0.438623, -0.036298,
-0.457155, -0.123895,
-0.443017, -0.239761,
-0.333914, -0.370416,
-0.238509, -0.415552,
-0.143103, -0.447210,
-0.015264, -0.458859,
};
double letter_d1[] = {
0.201921, 0.166840,
0.202679, 0.182716,
0.201478, 0.209592,
0.200000, 0.245338,
0.199170, 0.285514,
0.199298, 0.324164,
0.200628, 0.356920,
0.203567, 0.382294,
0.208675, 0.401603,
0.216465, 0.417345,
0.227141, 0.431093,
0.240564, 0.443229,
0.256365, 0.453172,
0.274400, 0.460291,
0.294957, 0.464321,
0.318714, 0.465354,
0.345982, 0.463514,
0.375657, 0.458505,
0.405080, 0.449557,
0.430514, 0.435231,
0.449290, 0.412602,
0.463973, 0.370117,
0.466592, 0.321481,
0.468970, 0.241971,
0.469557, 0.141277,
0.468917, 0.030611,
0.466712, -0.072655,
0.462341, -0.155056,
0.452636, -0.199979,
0.434497, -0.237234,
0.201921, 0.161833,
};