C12313211232233312111111312111133133313331323221312132231311212121   >>    C1231321123223331211111131211113313331333132322131213223131121212   <<    C12313211232233312111111312111133133313331323221312132231311212123   >>      C12313211232233312111111312111133133313331323221312132231311212122   >>