C1111233131211111211113313331333133313331313221131211113313222313221211   >>    C111123313121111121111331333133313331333131322113121111331322231322121   <<    C1111233131211111211113313331333133313331313221131211113313222313221213   >>      C1111233131211111211113313331333133313331313221131211113313222313221212   >>