pushValue (\u1 -> (\u2 -> u1 Term))
<hidden>:
| catchException "fail"
|   <try>
|   | pushValue (\u1 -> (\u2 -> (\u3 -> 'r' : u2 u3)))
|   | read ('r' ==)
|   | lift2Value (\u1 -> (\u2 -> u1 u2))
|   | call <hidden>
|   | lift2Value (\u1 -> (\u2 -> u1 u2))
|   | popException "fail"
|   | ret
|   <handler>
|     pushInput
|     lift2Value Term
|     choicesBranch [(\u1 -> u1)]
|       <branch>
|       | pushValue (\u1 -> u1)
|       | ret
|       <default>
|         raiseException "fail"
call <hidden>
lift2Value (\u1 -> (\u2 -> u1 u2))
<hidden>:
| lift2Value (\u1 -> (\u2 -> u1 u2))
| ret
catchException "fail"
  <try>
  | catchException "fail"
  |   <try>
  |   | pushInput
  |   | read (\u1 -> Term)
  |   | popValue
  |   | popException "fail"
  |   | loadInput
  |   | raiseException "fail"
  |   <handler>
  |     loadInput
  |     pushValue Term
  |     popException "fail"
  |     refJoin <hidden>
  <handler>
    pushInput
    lift2Value Term
    choicesBranch [(\u1 -> u1)]
      <branch>
      | raiseException "fail"
      <default>
        raiseException "fail"