Letter on position 1 (b) changed: 9 words dank fank hank lank rank sank tank wank yank Letter on position 2 (a) changed: 3 words bink bonk bunk Letter on position 3 (n) changed: 5 words back balk bark bask bauk Letter on position 4 (k) changed: 7 words banc band bane bang bani bans bant