int f (int a) {
    bool x = true;
    rat y = [0/1];
    int z = 0;
    while x {
       bool x = true;
       rat y = [0/1];
       int z = 0;
    } 
    bool x1 = true;
    rat y1 = [0/1];
    int z1 = 0;
    return 0;
}


main {
    bool x = true;
    rat y = [0/1];
    int z = 0;
    while x {
       bool x = true;
       rat y = [0/1];
       int z = 0;
    } 
    bool x1 = true;
    rat y1 = [0/1];
    int z1 = 0;
}