-C -t -f {1. First basics/1. First basics} b c #2 d x c x d x a #2 c x a x c x d b #2 a x d x a x c #2 d x c x d x a b #2 c x a x c x d #2 a x d x a x c b #2 d x c x d x a #2 c x a x c x d b b #2 a x d x a x c #2 d x c x d x a b #2 c x a x c x a #2 b x a x b x c b #2 a x c x a x b #2 d x b x d x a b #2 b x a x b x d #2 a x d x a x b b #2 d x b x d x a #2 b x a x b x d b b #2 a x d x a x b #2 d x b x d x a b #2 b x a x b x d #2a x d xa x b b #2 d x b x d xa #2b xa xb x d b #2a x d xa xb #2d xb xd xa b #2b xa xb xd #2f xd xb xa b b #2b xa x d x b #2 d x b x a x d b #2 b x d x a x b #2 d x b x a x d b #2 a x b x d x a #2 b x a x d x b b #2 d x b x a x c #2 a x c x a x b b #2 d x b x a x c #2 a x b x c x a b Y b d b b {1. First basics/1. First basics} b 1 b"+ d #2 d x a x c x d b 1 da #2 d x a x b x d b 1a d #2 d x a #2 c x d b 1 d a #2 d x b x a x d b 1 ab #2 b x a x c x a b 1 b d"+ #2 b x a x d x b b 1 da 1 bc 1 da b Y. b d b b {/} b c #2 b"+ d x a x c x d #2 da x a x b x d b #2a d x a x c x d #2 d a x b x a x d b #2 ab x a x c x a #2 b d"+ x a x d x b b 1 da 1 bc 0 da b Y b d b b e