Letter on position 1 (b) changed: 12 words cots dots hots jots lots mots oots pots rots sots tots wots Letter on position 2 (o) changed: 4 words bats bets bits buts Letter on position 3 (t) changed: 13 words boas bobs bods bogs bohs bois boks boos bops bors boss bows boys Letter on position 4 (s) changed: 3 words bota both bott