Letter on position 1 (a) changed: 12 words bids cids fids gids kids lids mids nids rids tids vids yids Letter on position 2 (i) changed: 3 words adds ands ards Letter on position 3 (d) changed: 6 words aias ails aims ains airs aits Letter on position 4 (s) changed: 1 word aide