C12313211232233312111111312111133133313331323221312132232323221   >>    C1231321123223331211111131211113313331333132322131213223232322   <<    C12313211232233312111111312111133133313331323221312132232323223   >>      C12313211232233312111111312111133133313331323221312132232323222   >>