C1111233131211111211113313331333131211111211111333133313331333133313233223311   >>    C111123313121111121111331333133313121111121111133313331333133313331323322331   <<    C1111233131211111211113313331333131211111211111333133313331333133313233223313   >>      C1111233131211111211113313331333131211111211111333133313331333133313233223312   >>