C1111233131211111211113313331333133313232321333133313331211331313121   >>    C111123313121111121111331333133313331323232133313331333121133131312   <<    C1111233131211111211113313331333133313232321333133313331211331313123   >>      C1111233131211111211113313331333133313232321333133313331211331313122   >>