David Abercrombie, a phonetician, takes a different view of the limerick, and one which seems to accord better with the form. It is this: Lines one, two, and five have three feet, that is to say three stressed syllables, while lines three and four have two stressed syllables. The number and placement of the unstressed syllables is rather flexible. There is at least one unstressed syllable between the stresses but there may be more – as long as there are not so many as to make it impossible to keep the equal spacing of the stresses.