C12313211232233312111111312111133133313331323133313332322321122332212321   >>    C1231321123223331211111131211113313331333132313331333232232112233221232   <<    C12313211232233312111111312111133133313331323133313332322321122332212323   >>      C12313211232233312111111312111133133313331323133313332322321122332212322   >>