class Main {
    main () { return new A().mt(new MyInteger() );   }
}


class A{
    mt(x) { return x.feld; }
}


class MyInteger {

}














/*
class Main {
mainI () { return new A().mt( new MyInteger() , new MyInteger() , new MyInteger() );  }
mainL () { return new A().mt( new MyList() , new MyList(), new MyList() ); }
}


class A{
mt(x,y,z) { return x.sub(y).add(z); }
}


class MyInteger {

}


class MyList{


}
*/