-- A small Hero class (provided).
local Hero = {}
Hero.__index = Hero
function Hero.new(name, hp)
    return setmetatable({ name = name, hp = hp, max_hp = hp }, Hero)
end

local party = { Hero.new("Ada", 100), Hero.new("Ben", 80), Hero.new("Cara", 120) }
local total = 0
for _, h in ipairs(party) do
    total = total + h.hp
end
print("Team HP: " .. total)