The guard could let you in if you help him with his crosswords.
Two words, seven and seven, first work ends in U, second starts with M. Famous hotel on Sunset Boulevard, featured in many works of noir and detective fiction.
This is the low-spoiler guide for "Crosswords puzzle" puzzle in Chinatown Detective Agency. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.