Letter on position 1 (c) changed: 14 words bads dads fads gads hads lads mads nads pads rads sads tads wads yads Letter on position 2 (a) changed: 3 words cids cods cuds Letter on position 3 (d) changed: 10 words caas cabs cags cams cans caps cars cats caws cays Letter on position 4 (s) changed: 2 words cade cadi