C1111133313331323223313331333133313331333131211113313331211113313232323221   >>    C111113331333132322331333133313331333133313121111331333121111331323232322   <<    C1111133313331323223313331333133313331333131211113313331211113313232323223   >>      C1111133313331323223313331333133313331333131211113313331211113313232323222   >>