Firstly, players' surnames in alphabetical order by numerical position. By this I mean have a team so that the goalie's surname begins with A, no.2 is a player whose surname begins with B, and so on so that no.11's surname begins with K, and then a one and only sub's surname begins with L. Then another twelve are picked, with the goalie's surname beginning with M, going through to no 11 who is a W, and the sub a Y. We miss out X and Z for above reasons.