YES
Input TRS:
      1: a(b(b(x1))) -> b(a(a(x1)))
      2: a(a(b(x1))) -> b(b(a(x1)))
Number of strict rules: 2
Direct POLO(bPol) ... removes: 1 2
      a 	w: 2 * x1 + 7720
      b 	w: 2 * x1 + 7721
Number of strict rules: 0