a a b a b c d e R c d e
A a b e a b a b c d a b c d e f a M a b f d a M b a b a M b
a M b M M M R M a M b M c a M a R b A a b b
a CF a b c a b a M b a b M a M b c a A b a b M b a A b a M
b C a M C a M b c R a M b a M b c
a b a b a b a b c c
a b a a b a b a b c
a b c d a b c a M b M c d a b c a M b M a M b c d M
a M MM b M c d M a b a b c a M b c a b a M b c a M b c
a M b