C1111233131211111211113313331333133313331313221131211113313232211313111   >>    C111123313121111121111331333133313331333131322113121111331323221131311   <<    C1111233131211111211113313331333133313331313221131211113313232211313113   >>      C1111233131211111211113313331333133313331313221131211113313232211313112   >>