C11111333133313232233133313331333133112111112113313331312123313112121   >>    C1111133313331323223313331333133313311211111211331333131212331311212   <<    C11111333133313232233133313331333133112111112113313331312123313112123   >>      C11111333133313232233133313331333133112111112113313331312123313112122   >>