svoid test_ai_ruleOfThree_4() { 
  test_ai_ruleOfThree_4(::ai_ruleOfThree_solver_4);
}

svoid test_ai_ruleOfThree_4(IF2<S> f) {
  ai_testRuleOfThreeGivingFirst(f, [[
    falling road => a road that falls
    walking man => a man that walks
    screaming girl => a girl that screams
  ]]);
}