func main()
	var aw: int :: cui@inputInt()
	var ab: int :: cui@inputInt()
	var bw: int :: cui@inputInt()
	var bb: int :: cui@inputInt()
	var c: int :: cui@inputInt()
	var d: int :: cui@inputInt()
	if(c <= ab)
		do ab :- c
		do bb :+ c
	else
		var cw: int :: c - ab
		var cb: int :: ab
		do aw :- cw
		do ab :- cb
		do bw :+ cw
		do bb :+ cb
	end if
	var ans: int :: aw + [d, bw].min()
	do cui@print("\{ans}\n")
end func