case 1 failed: expected "4\n0 1 2 3 \n1 2 3 0 \n2 3 0 1 \n0 1 2 3" got "4\n1 2 3 0\n2 3 0 1\n3 0 1 2\n1 2 3 0"
input:
1
4 4
exit status 1