key 13 and a
key 15 and a
key 16 and a
key 25 and a
key 41 and a
key  1 and b
key  3 and b
key 22 and b
key 40 and b
key 12 and c
key 38 and c
key 62 and c
key 75 and c
key  4 and d
key  5 and d
key 19 and d
key 37 and d
key  2 and e
key  8 and e
key 14 and e
key 39 and e
key 77 and e