Letter on position 1 (t) changed: 6 words bass jass lass mass pass sass Letter on position 2 (a) changed: 1 word toss Letter on position 3 (s) changed: 16 words tabs tads taes tags tais taks tams tans taos taps tars tats taus tavs taws tays Letter on position 4 (s) changed: 2 words tash task