C11112331312111112111133133313331333132322121111331311331333133313232322131   >>    C1111233131211111211113313331333133313232212111133131133133313331323232213   <<    C11112331312111112111133133313331333132322121111331311331333133313232322133   >>      C11112331312111112111133133313331333132322121111331311331333133313232322132   >>