C11112331312111112111133133313331312111112111113331333133313231323223311   >>    C1111233131211111211113313331333131211111211111333133313331323132322331   <<    C11112331312111112111133133313331312111112111113331333133313231323223313   >>      C11112331312111112111133133313331312111112111113331333133313231323223312   >>