Letter on position 1 (c) changed: 4 words basks hasks masks tasks Letter on position 2 (a) changed: 1 word cusks Letter on position 3 (s) changed: 4 words calks carks cauks cawks Letter on position 4 (k) changed: 4 words casas cases casts casus Letter on position 5 (s) changed: 1 word casky