C11111211113313112113313331333133313331333132322121111331311331123311   >>    C1111121111331311211331333133313331333133313232212111133131133112331   <<    C11111211113313112113313331333133313331333132322121111331311331123313   >>      C11111211113313112113313331333133313331333132322121111331311331123312   >>