Letter on position 1 (n) changed: 7 words berks jerks merks perks serks yerks zerks Letter on position 2 (e) changed: 2 words narks norks Letter on position 3 (r) changed: 2 words necks neuks Letter on position 4 (k) changed: 2 words nerds nerts Letter on position 5 (s) changed: 1 word nerka