C1111233131211111211113313331333133313232321333133313331333211111112111   >>    C111123313121111121111331333133313331323232133313331333133321111111211   <<    C1111233131211111211113313331333133313232321333133313331333211111112113   >>      C1111233131211111211113313331333133313232321333133313331333211111112112   >>