Exchangingletters:atypeofjokeinwhichthefirstlettersofsimilarsoundingwordsintheanswerareexchanged.AGoodOldBritishJoke一个绝妙的古老英国笑话Asyouknow,theBritishlovewordplay,andtherearemanyjokesbeginningwiththequestion,"What'sthedifference?"betweentwocompletelydifferentthings.Theanswerssoundalmostthesame,butweexchangethefirstletters.
