Letter on position 1 (f) changed: 18 words bills cills dills gills hills jills kills lills mills nills pills rills sills tills vills wills yills zills Letter on position 2 (i) changed: 3 words falls fells fulls Letter on position 4 (l) changed: 3 words files films filos Letter on position 5 (s) changed: 3 words fille fillo filly