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