this script is supposed to add together 2 int values why doesnt it work?

local d = 0
script.Parent.Touched:Connect(function(hit)
    local h = hit.Parent:FindFirstChild("Humanoid")
    local p = game.Players:GetPlayerFromCharacter(hit.Parent)
    local stats = p:FindFirstChild("leaderstats")
    local str = stats.Strenght
    local coins = stats.Coins
    if h and d == 0 then
        coins.Value = 0 + str.Value

    end
end)

it does not add to the coins value any help is apriciated