Letter on position 1 (p) changed: 15 words aits bits cits dits fits gits hits kits lits nits rits sits tits wits zits Letter on position 2 (i) changed: 4 words pats pets pots puts Letter on position 3 (t) changed: 8 words pias pics pies pigs pins pips pirs piss Letter on position 4 (s) changed: 3 words pita pith pity