C1111233131211111211113313331333133313232321333133313332331221111   >>    C111123313121111121111331333133313331323232133313331333233122111   <<    C1111233131211111211113313331333133313232321333133313332331221113   >>      C1111233131211111211113313331333133313232321333133313332331221112   >>