Letter on position 1 (b) changed: 14 words cads dads fads gads hads lads mads nads pads rads sads tads wads yads Letter on position 2 (a) changed: 4 words beds bids bods buds Letter on position 3 (d) changed: 11 words baas bacs bags bals bams bans baps bars bass bats bays Letter on position 4 (s) changed: 1 word bade