Letter on position 1 (p) changed: 10 words bull cull dull full gull hull lull mull null wull Letter on position 2 (u) changed: 4 words pall pell pill poll Letter on position 3 (l) changed: 1 word purl Letter on position 4 (l) changed: 8 words pula pule puli pulk pulp puls pulu puly