the target is tensor([17, 16,  8, 18,  9, 14, 11, 18,  9,  2, 15,  8, 11, 12, 12,  8,  5, 20,
3, 21,  2, 12,  3,  5, 18,  8, 14, 17,  6,  8, 21,  0, 20,  2,  8, 13,
21, 18,  8,  4,  2,  4,  9, 11,  3, 12, 15,  1,  7,  2,  4],
device=‘cuda:0’)
it has 51 values. they are from 0 to 21