MAYBE

'Pop* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  lcs(e(), y) -> 0()
     , lcs(x, e()) -> 0()
     , lcs(a(x), a(y)) -> s(lcs(x, y))
     , lcs(b(x), b(y)) -> s(lcs(x, y))
     , lcs(a(x), b(y)) -> max(lcs(x, b(y)), lcs(a(x), y))
     , lcs(b(x), a(y)) -> max(lcs(x, a(y)), lcs(b(x), y))
     , max(x, 0()) -> 0()
     , max(0(), y) -> 0()
     , max(s(x), s(y)) -> max(x, y)}

Proof Output:    
  The input cannot be shown compatible