Letter on position 1 (b) changed: 10 words feds geds keds meds neds peds reds teds weds zeds Letter on position 2 (e) changed: 4 words bads bids bods buds Letter on position 3 (d) changed: 6 words bees begs bels bens bets beys Letter on position 4 (s) changed: 2 words bede bedu