How many variatons of winners are there in 15 1vs1 matchs

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I am trying to find a program or some way to show me every variation of winners from just 5 matchs of 1vs1. I think there should be 900 variation i just need a way to see it all written down .. For example A1 b1 c1 d1 e1 f1 g1 h1 j1/ A2 b1 c1 d1 e1 f1 g1 h1 j1/ A1 b2 c1 d1 e1 f1 g1 h1 j1

Is there any kind of program that does this?