In any reply to a tweet on Twitter, include the word "l" to give a loss, or "w" anywhere in the reply tweet to give a win to the user you are replying to.
Example
Here's a W given to @MsRebeccaBlack. L and W Bot will reply to confirm and give totals for the user you replied to.
A win has been given.
Totals for this users are now: 🇼: 1 🇱: 0#LandWBot