Sheldon Allan Silverstein - Woulda-Coulda-Shoulda

All the Woulda-Coulda-Shouldas
Layin' in the sun,
Talkin' 'bout the things
They woulda coulda shoulda done...
But those Woulda-Coulda-Shouldas
All ran away and hid
From one little Did.

Sheldon Allan Silverstein

http://www.poemhunter.com/poem/woulda-coulda-shoulda/