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