YES(?,O(n^1))

Problem:
 c(b(a(X))) -> a(a(b(b(c(c(X))))))
 a(X) -> e()
 b(X) -> e()
 c(X) -> e()

Proof:
 Bounds Processor:
  bound: 1
  enrichment: match
  automaton:
   final states: {4,3,2}
   transitions:
    e1() -> 5*
    c0(1) -> 2*
    b0(1) -> 4*
    a0(1) -> 3*
    e0() -> 1*
    5 -> 2,4,3
  problem:
   
  Qed