my @letters =
    ('a') x 9, ('b') x 2, ('c') x 2, ('d') x 4, ('e') x 12, ('f') x 2,
    ('g') x 4, ('h') x 2, ('i') x 9, ('j') x 1, ('k') x 1, ('l') x 4, ('m') x 2,
    ('n') x 6, ('o') x 8, ('p') x 2, ('q') x 1, ('r') x 6, ('s') x 4, ('t') x 6,
    ('u') x 4, ('v') x 2, ('w') x 2, ('x') x 1, ('y') x 2, ('z') x 1;