7 r r r 2 87
3 4 5 2 3 r 2 3 7 88
7 r r 2 3 2 3 89
2 a b 3 a a b 4 5 6 a b a r b a a 7 90
7 a b c d a e f g h i j b c d e f g h i j 2 9
r a 2 3 2 3 4 7 92