public boolean monkeyTrouble1(boolean aSmile, boolean bSmile) {
  if (aSmile) {
    if (bSmile) {
      return true;
    }
    else { // !bSmile
      return false;
    }
  }
  else { // !aSmile
    if (bSmile) {
      return false;
    }
    else { // !bSmile
      return true;
    }
  }
}

public boolean monkeyTrouble2(boolean aSmile, boolean bSmile) {
  if (aSmile) {
    return bSmile;
  }
  else { // !aSmile
    return !bSmile;
  }
}

public boolean monkeyTrouble3(boolean aSmile, boolean bSmile) {
  if (aSmile && bSmile) {
    return true;
  }
  else if (!aSmile && !bSmile) {
    return true;
  }
  else {
    return false;
  }
}

public boolean monkeyTrouble4(boolean aSmile, boolean bSmile) {
  return (aSmile && bSmile) || (!aSmile && !bSmile);
}

public boolean monkeyTrouble(boolean aSmile, boolean bSmile) {
  return aSmile == bSmile;
}