func main()
	var n: int :: cui@inputInt()
	var wish: []dict<[]char, int> :: #[21]dict<[]char, int>
	for(1, n)
		switch(cui@inputInt())
		case 0
			var c: int :: cui@inputInt()
			do wish[c] :: #dict<[]char, int>
			var m: int :: cui@inputInt()
			for(1, m)
				var a: []char :: cui@inputStr()
				do wish[c].add(a, wish[c].get(a, &) + 1)
			end for
		case 1
			var b: []char :: cui@inputStr()
			var ans: int :: -1
			for c(1, 20)
				if(wish[c] <>& null & wish[c].get(b, &) <> 0)
					do wish[c].add(b, wish[c].get(b, &) - 1)
					do ans :: c
					break c
				end if
			end for
			do cui@print("\{ans}\n")
		case 2
			var c: int :: cui@inputInt()
			do wish[c] :: null
		end switch
	end for
end func