function printHelp()
    print("[1] Add item")
    print("[2] Delete item")
    print("[3] List all items")
    print("[4] Change quantity of item")
end

function getConfig()
    local lines = {}
    local h = fs.open("./", "config")
    for line in h.readLine do
        lines[#lines+1] = line
    end
    h.close()
    return lines
end

printHelp()
local action = read()

if action == "3" then
    local config = getConfig()
    print(config)
end