begin
  integer i,j
  comment integer i,j
  integername in1,in2
  comment integername in1,in2
  in2 == i
  comment in2 == i
  in1 == in2
  comment in1 == in2
  in1 = j
  comment in1 = j
  i = in1
  comment i = in1
  i = j
  comment i = j
endofprogram