C1111233131211111211113313331333133313331311213331323133313232311   >>    C111123313121111121111331333133313331333131121333132313331323231   <<    C1111233131211111211113313331333133313331311213331323133313232313   >>      C1111233131211111211113313331333133313331311213331323133313232312   >>