Letter on position 1 (a) changed: 7 words bris cris fris gris iris kris sris Letter on position 2 (r) changed: 4 words ahis amis anis axis Letter on position 3 (i) changed: 8 words arbs arcs ards ares arfs arks arms arts Letter on position 4 (s) changed: 3 words aria arid aril