C11111211113313112113313331333133313113121111331333133313331311331333132232221   >>    C1111121111331311211331333133313331311312111133133313331333131133133313223222   <<    C11111211113313112113313331333133313113121111331333133313331311331333132232223   >>      C11111211113313112113313331333133313113121111331333133313331311331333132232222   >>