N = 13;
M = 13;
R = 5;
C = 8;
a = [|183,236,246,958,876,909,123,127,129,252,144,589,21,
     |635,741,89,426,899,328,674,346,207,974,906,233,953,
     |253,896,357,836,25,258,348,995,597,512,317,552,645,
     |265,258,542,386,768,619,859,270,31,447,913,816,407,
     |183,708,82,967,339,473,721,355,321,804,717,679,795,
     |298,674,116,561,697,837,25,14,388,411,950,167,428,
     |567,733,226,371,274,931,923,203,96,574,549,983,376,
     |774,615,232,237,240,804,498,843,393,464,592,683,416,
     |104,869,403,384,41,28,759,540,83,43,517,308,423,
     |316,944,671,455,364,2,761,766,567,272,143,968,780,
     |209,688,650,164,519,318,5,665,745,877,383,333,792,
     |508,347,65,936,698,234,47,369,611,730,97,583,19,
     |926,939,95,225,654,926,148,904,832,95,336,554,815|];