C12313211232233312111111312111133133313331323133313331122332321132311323213121   >>    C1231321123223331211111131211113313331333132313331333112233232113231132321312   <<    C12313211232233312111111312111133133313331323133313331122332321132311323213123   >>      C12313211232233312111111312111133133313331323133313331122332321132311323213122   >>