Letter on position 1 (s) changed: 6 words bass jass lass mass pass tass Letter on position 2 (a) changed: 4 words sess siss soss suss Letter on position 3 (s) changed: 13 words sabs sacs sads sags sais sals sams sans saps sars savs saws says Letter on position 4 (s) changed: 1 word sash