C11112331312111112111133133313331333132322121111331311331333131133131121311   >>    C1111233131211111211113313331333133313232212111133131133133313113313112131   <<    C11112331312111112111133133313331333132322121111331311331333131133131121313   >>      C11112331312111112111133133313331333132322121111331311331333131133131121312   >>