Letter on position 1 (t) changed: 6 words brill drill frill grill krill prill Letter on position 2 (r) changed: 2 words thill twill Letter on position 3 (i) changed: 2 words troll trull Letter on position 4 (l) changed: 2 words trial triol Letter on position 5 (l) changed: 1 word trild