C1111233131211111211113313331333133313232321333133313331333131122223323221   >>    C111123313121111121111331333133313331323232133313331333133313112222332322   <<    C1111233131211111211113313331333133313232321333133313331333131122223323223   >>      C1111233131211111211113313331333133313232321333133313331333131122223323222   >>