Letter on position 1 (s) changed: 7 words ceas keas leas peas teas yeas zeas Letter on position 2 (e) changed: 2 words skas spas Letter on position 3 (a) changed: 12 words secs sees segs seis sels sens seps sers sess sets sews seys Letter on position 4 (s) changed: 5 words seal seam sean sear seat