C1111233131211111211113313331333133313331313221131211113313121111122331311   >>    C111123313121111121111331333133313331333131322113121111331312111112233131   <<    C1111233131211111211113313331333133313331313221131211113313121111122331313   >>      C1111233131211111211113313331333133313331313221131211113313121111122331312   >>