local words = {"Enjoy", "Rosetta", "Code"}
for h = 1, 3 do
    local threads = {}
    for i = 1, 3 do threads[i] = coroutine.create(|| -> print(words[i])) end
    local called = {false, false, false}
    local j = 0
    while j < 3 do
        local k = math.random(1, 3)
        if !called[k] then
            coroutine.resume(threads[k])
            called[k] = true
            j += 1
        end
    end
    print()
end