Urim-burim
In the refrain of Mikhl Gelbart’s Purim song Urim-burim the name of the holiday occurs four times, with the first letter replaced by successive letters of the alef-beys:
Everyone have fun today on our Purim holiday. Urim-Burim-Gurim-Durim: sing a little song of Purim! Giving gifts upon this date reminds us all to celebrate! So let’s sing and let’s be gay and whirl the grager all the day.