C11111211113313112113313331333133313133313233112111133131133132213111   >>    C1111121111331311211331333133313331313331323311211113313113313221311   <<    C11111211113313112113313331333133313133313233112111133131133132213113   >>      C11111211113313112113313331333133313133313233112111133131133132213112   >>