local even
local odd

odd = function (n)
    if n == 1 then return true end
    if n == 2 then return false end
    return even(n-1)
end

even = function (n)
    if n == 1 then return false end
    if n == 2 then return true end
    return odd(n-1)
end

print(even(1000000000000000000))