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##C++##

unsigned int Rand4()
{
    unsigned int r = Rand5();

    while(r == 5)
        r = Rand5();

    return(r);
}

unsigned int myRand2()
{
    return((Rand4() - 1) & 1);
}

unsigned int Rand7()
{
    return(((myRand2() << 2) | (myRand2() << 1) | myRand2()) + 1);
}