if c.1 then do
  t.1
else e.1
if c.1 then do
  t.1;
  t.1
else e.1
if c.1 then do
  t.1
else do
  e.1
if let x.1 := c.1 then do
  t.1
else do
  e.1
if c.1 then do
  t.1
else
  if c.1 then do
    t.1
  else do
    e.1
do
  if c.1 then 
    t.1
  else
    e.1
do
  if c.1 then 
    t.1
  else if c.1 then
    t.1
  else
    e.1
def foo.1 := by 
  · skip; skip
  · skip; skip
    skip
    (skip; skip)
    ( skip; skip
      try skip; skip
      try 
        skip
        skip
      skip)
by
  try 
    skip
    skip
by
   try 
      skip
      skip
by try  skip
        skip
by  try skip
        skip
    skip
{ foo.1 := bar.1
  bar.1 := foo.1 + bar.1 }
let x.1 :=
  { foo.1 := bar.1
    bar.1 := foo.1 + bar.1 }
x.1