@{
  @(`declaration int a = 5;);
  @(`declaration int b = 2;);
}

int main() {
  @{
    a = (`declaration int a = 2;);
    @(`declaration int c = 5;);
    b = 5;
    @(`declaration int d = 2;);
    @(`statement for(int i =0; i < 10; i++) {
      a = 2;
    });
  };
}