C12313211232233312111111312111133133313331323133313331213331121213313132231221   >>    C1231321123223331211111131211113313331333132313331333121333112121331313223122   <<    C12313211232233312111111312111133133313331323133313331213331121213313132231223   >>      C12313211232233312111111312111133133313331323133313331213331121213313132231222   >>