Program
{
   x = 0
   {
      x = 1
      y = 1
      x = 2
   }
   print(x)  // what should be printed?
}


Program
{
   {
      x = 1
   }
   print(x)  // what should be printed?
}


Program
{
   print(x)  // what should be printed?
   {
      x = 1
   }
   x = 0
}



Program
{
   print(x)  // what should be printed?
}