C12313211232233312111111312111133133313331333132232233122322231123231   >>    C1231321123223331211111131211113313331333133313223223312232223112323   <<    C12313211232233312111111312111133133313331333132232233122322231123233   >>      C12313211232233312111111312111133133313331333132232233122322231123232   >>