You examine the trunk...
The President-Elect stares over your shoulder. You tug on the lid, but it appears to be firmly shut and locked. The key is missing. If only you knew where to look for the key.
+ Hint 1
The words Roman and Substitute are on the trunk. What can you substitute something Roman for on the trunk.
+ Hint 2
Why is there a 4 in the middle of a word?
+ Hint 3
What is 4 in Roman numerals?
Enter "knives" into the trunk