To find the set of letters in the word "messenger," follow these steps:
1. Identify all the letters: The letters in the word "messenger" are: m, e, s, s, e, n, g, e, r.
2. Remove any duplicates: This leaves us with the unique letters: m, e, s, n, g, r.
3. Sort the unique letters in alphabetical order: Sorting the letters gives us: e, g, m, n, r, s.
Therefore, the set of letters in the word "messenger," written in alphabetical order with no spaces, is:
[e, g, m, n, r, s]
