C11112331312111112111133133313331333133313112113313113313232131   >>    C1111233131211111211113313331333133313331311211331311331323213   <<    C11112331312111112111133133313331333133313112113313113313232133   >>      C11112331312111112111133133313331333133313112113313113313232132   >>