# Yasnippet expand snippet automatically instead of prompting possible completions

I have two snippets:

• e[TAB] expands to 1 0 ($1 and$0 are placeholders);
• emph expands to \emph{$0} ($0 is a placeholder, this is a default snippet I suppose)

I'm writing a lot of equations between text in Auctex and whenever I type "e[TAB]" I want yasnippet to expand the first snippet directly. Instead, what it does is to prompt a list of possible completions, which in this case is those two snippets. What can I do about that?