C11111211113313112113313331333133313113121111331333133313331323232131211   >>    C1111121111331311211331333133313331311312111133133313331333132323213121   <<    C11111211113313112113313331333133313113121111331333133313331323232131213   >>      C11111211113313112113313331333133313113121111331333133313331323232131212   >>