Letter on position 1 (b) changed: 15 words aits cits dits fits gits hits kits lits nits pits rits sits tits wits zits Letter on position 2 (i) changed: 4 words bats bets bots buts Letter on position 3 (t) changed: 6 words bias bibs bids bigs bins bios Letter on position 4 (s) changed: 3 words bite bito bitt