Letter on position 1 (t) changed: 16 words bats cats eats fats gats hats kats lats mats nats oats pats qats rats vats wats Letter on position 2 (a) changed: 4 words tets tits tots tuts Letter on position 3 (t) changed: 16 words tabs tads taes tags tais taks tams tans taos taps tars tass taus tavs taws tays Letter on position 4 (s) changed: 4 words tate tath tatt tatu