YES(?,O(n^1))

Problem:
 app(app(apply(),f),x) -> app(f,x)

Proof:
 Bounds Processor:
  bound: 0
  enrichment: match
  automaton:
   final states: {2}
   transitions:
    app0(1,1) -> 2*
    apply0() -> 1*
  problem:
   
  Qed