rain = Bernoulli(r0)
umbrella = Bernoulli(u0)
while true:
    if rain == 1:
        rain = Bernoulli(r1)
    else:
        rain = Bernoulli(r2)
    end

    if rain == 1:
        umbrella = Bernoulli(u1)
    else:
        umbrella = Bernoulli(u2)
    end
end