Letter on position 1 (s) changed: 9 words ceps heps keps leps neps peps reps yeps zeps Letter on position 2 (e) changed: 4 words saps sips sops sups Letter on position 3 (p) changed: 12 words seas secs sees segs seis sels sens sers sess sets sews seys Letter on position 4 (s) changed: 1 word sept