C1111233131211111211113313331333133313331313221131211113313232213223111211   >>    C111123313121111121111331333133313331333131322113121111331323221322311121   <<    C1111233131211111211113313331333133313331313221131211113313232213223111213   >>      C1111233131211111211113313331333133313331313221131211113313232213223111212   >>