C11111211113313112113313331333133313231311331333121211113313331323331322131211   >>    C1111121111331311211331333133313331323131133133312121111331333132333132213121   <<    C11111211113313112113313331333133313231311331333121211113313331323331322131213   >>      C11111211113313112113313331333133313231311331333121211113313331323331322131212   >>