Goal:
    A : Type  H : ReflectEq A  l1 : list A  l2 : list A  l : list A
  ============================
   (is_suffix l l1 → is_suffix l l2 → is_suffix l (snd (split_suffix l1 l2)))


DEBUG:Going to execute:
<coq-core.plugins.ssreflect::ssrmove@1> $1 $2