C1111233131211111211113313331333133313232212111133132213331323133313232232311   >>    C111123313121111121111331333133313331323221211113313221333132313331323223231   <<    C1111233131211111211113313331333133313232212111133132213331323133313232232313   >>      C1111233131211111211113313331333133313232212111133132213331323133313232232312   >>