10
 0:  9  2  6  5  1  4  7  8  3  0
 1:  3  6  5  8  7  2  4  9  0  1
 2:  9  3  4  6  0  5  8  1  7  2
 3:  0  6  5  8  9  4  2  1  7  3
 4:  2  1  6  9  8  5  3  7  0  4
 5:  4  7  0  9  6  2  1  8  3  5
 6:  9  8  4  3  7  5  1  0  2  6
 7:  1  2  0  8  5  3  6  4  9  7
 8:  5  1  4  9  3  7  0  2  6  8
 9:  5  0  7  4  1  3  2  8  6  9