def generateNumbers():
    def test(n):
        frankenstein = str(n)[:-1]
        frankenstein = str(n)[-1] + frankenstein
        frankenstein = int(frankenstein)
        return (frankenstein == (2 * n))
    def generateOneLevel(prefix):
        for i in range(10):
            yield int(str(prefix) + str(i))
    def compoundGenerator(a):
        gens = (generateOneLevel(x) for x in a)
        def newGen(gs):
            for g in gs:
                for n in g:
                    yield n
        return newGen(gens)

    gen = generateOneLevel("")
    for _ in range(50):
        gen = compoundGenerator(gen)
    while True:
        n = next(gen)
        if n % 100 == 0:
            print(n)
        if test(n) and n is not 0:
            print(n)
            break

generateNumbers()