a = matrix(QQ,15,[4,8,3,1,0,4,8,1,5,6,2,3,8,6,7,1,3,9,4,2,1,5,5,8,6,7,5,5,1,6,4,0,6,0,6,4,3,3,4,3,9,0,5,6,7,2,0,8,0,7,1,7,1,8,3,5,5,1,3,4,1,8,4,1,1,6,6,1,4,7,1,8,2,8,0,7,4,2,4,3,6,9,1,5,8,3,0,2,0,5,5,8,9,0,2,9,3,6,7,6,8,0,5,2,0,7,6,2,6,5,8,7,1,9,2,5,1,5,0,0,6,9,5,6,7,5,8,4,3,6,2,1,5,3,7,3,3,3,4,1,2,5,3,4,6,8,8,5,7,1,6,0,1,2,0,7,3,5,6,7,9,1,8,1,3,4,6,8,1,3,5,4,8,1,9,5,6,7,6,7,7,4,6,7,1,8,9,9,4,9,2,8,5,7,2,5,3,3,3,3,7,2,8,5,0,5,4,1,6,6,5,9,1,4,7,5,4,0,8,3,1,9,3,4,2])
