Letter on position 1 (b) changed: 16 words cays days fays gays hays jays kays lays mays nays pays rays says tays ways yays Letter on position 2 (a) changed: 3 words beys boys buys Letter on position 3 (y) changed: 11 words baas bacs bads bags bals bams bans baps bars bass bats Letter on position 4 (s) changed: 2 words baye bayt