Letter on position 1 (b) changed: 10 words dacked hacked jacked lacked packed racked sacked tacked vacked yacked Letter on position 2 (a) changed: 3 words becked bocked bucked Letter on position 3 (c) changed: 5 words balked banked barked basked bauked Letter on position 4 (k) changed: 1 word bached Letter on position 6 (d) changed: 2 words backer backet