C1111133313331323223313331333133313331323131211113313113313223111221   >>    C111113331333132322331333133313331333132313121111331311331322311122   <<    C1111133313331323223313331333133313331323131211113313113313223111223   >>      C1111133313331323223313331333133313331323131211113313113313223111222   >>