Moving people around

What im trying to do is on one page put a list of people with 1 of 3 letters L,S or N.

Then on the next page put then in the relevant lines.

So for arguments sake in the first title Liquid then in the next amount of lines the people with the l next to them.
then the people with s next to them and finally the ones with n next to them.
but page 2 has to be dynamic as if you change the letter in the first page it has to move up or down the list in the second eg.

page 1

john smith n

page 2

John Smith is in the n list