He started it back in 1961. The assignment-write a ten page letter to your future self.

1961年他也曾经有过写信的经历。这是封长达10页写给未来自己的信。

It would come on a strip of paper, like maybe two inches long, I mean not even the courtesy of a full page letter.

它会出现在一张纸条上， 大约两英寸长，我的意思是甚至不是整页信件的礼貌。