"I remember mulling over the tune 'Yesterday', and suddenly getting these little one-word openings to the verse. I started to develop the idea ... da-da da, yes-ter-day, sud-den-ly, fun-il-ly, mer-il-ly and Yes-ter-day, that's good. All my troubles seemed so far away. It's easy to rhyme those a's: say, nay, today, away, play, stay, there's a lot of rhymes and those fall in quite easily, so I gradually pieced it together from that journey. Sud-den-ly, and 'b' again, another easy rhyme: e, me, tree, flea, we, and I had the basis of it."[12]