The Legend of Zelda: Majora's Mask Walkthrough

Majora's Mask p.11

Moon's Tear
Now that you have the password, you can go to East Clock Town and have a little chat with the Bomber wearing the yellow cap. He'll give you the "Hmm" as well as demand for their secret code. Didn't he see you chasing his buddies? Give it to him and he'll stand out of the way. This part should be obvious: ...go inside.