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by LegionMammal978 733 days ago
Actually, I was mistaken. The line numbers aren't even numbers, so much as digit pairs, given how one-digit labels take the first digit.

And the "DO" command takes a group number, runs each line within the group, then returns after the end of the group. So each group can effectively act as a subroutine. (In this particular game, this can be seen in groups 6 and 9.)