MAYBE
Input TRS:
      1: h(f(x,y)) -> f(y,f(h(h(x)),a()))
Number of strict rules: 1
Direct POLO(bPol) ... failed.
Uncurrying ... failed.
Dependency Pairs:
     #1: #h(f(x,y)) -> #h(h(x))
     #2: #h(f(x,y)) -> #h(x)
Number of SCCs: 1, DPs: 2
  SCC { #1 #2 }
POLO(Sum)... POLO(max)... QLPOS... POLO(mSum)... QWPOpS(mSum)... Mat2b... failed.
Finding a loop...  failed.