C312312111111331312111133133313331333131331123313331323223313123221   >>    C31231211111133131211113313331333133313133112331333132322331312322   <<    C312312111111331312111133133313331333131331123313331323223313123223   >>      C312312111111331312111133133313331333131331123313331323223313123222   >>