C12313211232233312111111312111133133313331323221312132232312121   >>    C1231321123223331211111131211113313331333132322131213223231212   <<    C12313211232233312111111312111133133313331323221312132232312123   >>      C12313211232233312111111312111133133313331323221312132232312122   >>