3
tiancaihb WA 6
tiancaihb TL 7
tiancaihb ML 4

-->1 1

or
2
tiancaihb WA 6
tiancaihb TL 7

-->1 1
or
2
tiancaihb WA 7
tiancaihb TL 6

Maybe helpful for a few people... I was trapped in test 7 of this (REAL) problem.

3
tiancaihb WA 6
tiancaihb TL 7
tiancaihb ML 4

-->1 1

why???????????????????????

Yeah, why? I really forget. But that's what my AC prog said

Because the second solution will become TL6 and that 'changed'
.

My Program passed all of this tests but still WA7.