C12313211232233312111111312111133133313331333112331311311213313132132321   >>    C1231321123223331211111131211113313331333133311233131131121331313213232   <<    C12313211232233312111111312111133133313331333112331311311213313132132323   >>      C12313211232233312111111312111133133313331333112331311311213313132132322   >>