Your friend Sean lost in a singing contest. This makes him sad. Encourage him by saying that the failure can be a whip for a better future,

hey sean.
ive heard from the teachers that you lost in the competition. come on sean. its a competition. you can join it next time. and im sure you will win in the next one. just think that this one is your practice to get the first place in your next competition, you know, a failure can be a whip for a better future.