C12313211232233312111111312111133133313331323133313332322321123323221232321   >>    C1231321123223331211111131211113313331333132313331333232232112332322123232   <<    C12313211232233312111111312111133133313331323133313332322321123323221232323   >>      C12313211232233312111111312111133133313331323133313332322321123323221232322   >>