Letter on position 1 (p) changed: 7 words berks jerks merks nerks serks yerks zerks Letter on position 2 (e) changed: 2 words parks porks Letter on position 3 (r) changed: 4 words peaks pecks peeks penks Letter on position 4 (k) changed: 7 words peres peris perms perns perps perts pervs Letter on position 5 (s) changed: 1 word perky