Your job is to group them by letter and put them in numerical order.

你的工作是把它们按字母编组，再把它们按数字顺序排序。

《柯林斯英汉双解大词典》

youdao

youdao

It doesn't make clear that including documents like an order of protection or explanatory letter may prevent an IRS rejection.

WSJ: Tax Report: A New Push to Protect 'Innocent Spouses'

Jack assures me that he will work to make at least one letter legible in order not to debase our currency.

FORBES: Jack Lew's Signature Gets Memed

Go into every interview hoping you come home with a purchase order, a conditional purchase letter, or letter of interest from the decision-maker.

FORBES: Are You Making Something Usable? Part 6 -- How to do it.