C12313211232233312111111312111133133313331323133313331122332321131221223321   >>    C1231321123223331211111131211113313331333132313331333112233232113122122332   <<    C12313211232233312111111312111133133313331323133313331122332321131221223323   >>      C12313211232233312111111312111133133313331323133313331122332321131221223322   >>