Each puzzle answer consists of 13 letters that are one letter away from forming a winning mahjong hand. (A winning mahjong hand consists of four melds of 3 tiles/letters and one pair of tiles/letters; a meld can consist of three of a kind or of a straight of three consecutive tiles/letters. So, for instance, MIDDLE KINGDOM gives DDD, EG, II, KLM, and MNO; add an F to form a winning hand.) Take the letter that can be added to each answer to give a winning hand, and the resulting letters spell the answer FIND A FOURTH.