C11111333133313232233133313331333133313331311331333132313211231   >>    C1111133313331323223313331333133313331333131133133313231321123   <<    C11111333133313232233133313331333133313331311331333132313211233   >>      C11111333133313232233133313331333133313331311331333132313211232   >>