ey, it's with the guard. To save yourself the trouble, open the scene map (upper right corner). At the bottom, there's a guy talking on the phone. Complete the scene and get the guard drunk with beer, or win the fight with him and steal the piece of paper with the code. Then go to the store and say the word.
The second mask is also with the guard (the guy in the suit on the map). Complete the scene with him.