C1111233131211111211113313331333133313232321333133313121111331121123113121   >>    C111123313121111121111331333133313331323232133313331312111133112112311312   <<    C1111233131211111211113313331333133313232321333133313121111331121123113123   >>      C1111233131211111211113313331333133313232321333133313121111331121123113122   >>