如何按行长度排序，然后按字母顺序反向

I have a large (600 odd) set of search and replace terms that I need to run as a sed script over some files. The problem is that the search terms are NOT orthogonal... but I think I can get away with it by sorting by line length (i.e. pull out the longest matches first, and then alphabetically within each length. So given an unsort set of:I have a large (600 odd) set of search and repl