sort by two paremeters?

[Nicolas Cueto]

Before I go ahead and script something complex,
I'm wondering if Rev already has a built-in way of
doing the following sort.

Given a list of 2-item lines, such as

  a 1
  d 3
  c 3
  c 2
  a 3
  d 2
  a 2
  c 1
  d 1

I'd like the list to be sorted by item 1,
and, in the case of lines with the
same item 1, sorted by item 2, thus:

  a 1
  a 2
  a 3
  c 1
  c 2
  c 3
  d 1
  d 2
  d 3

Any suggestions?

Thanks.

--
Nicolas Cueto