func main()
	var N: int :: cui@input().toInt(&)
	var nums: []bool :: [true].repeat(10)
	for(0, N - 1)
		var _: [][]char :: cui@input().split(" ")
		var R: bool :: _[4] = "YES"
		var tmp: []bool :: [!R].repeat(10)
		for i(0, 3)
			do tmp[_[i].toInt(&)] :: R
		end for
		for i(0, 9)
			do nums[i] :: nums[i] & tmp[i]
		end for
	end for
	for i(0, 9)
		if(nums[i])
			do cui@print("\{i}\n")
		end if
	end for
end func