using System;

public struct Foo[T]
{
  public  mutable  Data : T;
  public  mutable  Data2 : T;

  public this ( a : T, b :  T)
  {
    this.Data = a;
    this.Data2 = b;
  }
}

public class Test[T]
{
  public  mutable  Data : T;
  public  mutable  Data2 : T;

  public this ( a : T, b :  T)
  {
    this.Data = a;
    this.Data2 = b;
  }
}

class X
{
  static Main () :  int
  {
    mutable  foo =  Foo (3, 5);
    if (foo.Data != 3)
    {
       1;
    }
    else
  {
    if (foo.Data2 != 5)
    {
       2;
    }
    else
  {

    mutable  test =  Test (3, 5);
    if (test.Data != 3)
    {
       3;
    }
    else
  {
    if (test.Data2 != 5)
    {
       4;
    }
    else
  {

     0;
  }
  }
  }
  }
  }
}
/*
BEGIN-OUTPUT
END-OUTPUT
*/