C11111333133313232233133313331333133112111112113313133313231322121   >>    C1111133313331323223313331333133313311211111211331313331323132212   <<    C11111333133313232233133313331333133112111112113313133313231322123   >>      C11111333133313232233133313331333133112111112113313133313231322122   >>