Letter on position 1 (k) changed: 13 words bobs cobs dobs fobs gobs hobs jobs lobs mobs nobs robs sobs yobs Letter on position 2 (o) changed: 2 words kabs kebs Letter on position 3 (b) changed: 7 words koas kois kons kops kors koss kows Letter on position 4 (s) changed: 1 word kobo