program {
  int param;
  write ("Specify int>> ");  read (param);
  case (param) of
    1, 3: {write(1," or ",3);
		case (param+1) of
		  2: write("   inside +1= ",2);
		  4: write("   inside +1= ",4);
		  6: write("   inside +1= ",6);
		end;
	}
    2: write(2);
  end;
}