ROOM 3. FREEZING

"chApped codes on top and on Bottom"

source code time.

so, uh, it asks us to remove delta (letter d in nato) from the "chapped" part... yeah

yeah i... probably could've used a better hinting for chappe code... 😅

below that is an hinting in which is which and a hint for semaphore, "raised flags", with # being the glyph.

upon doing the maths and putting each symbol in the exact order, we get a string like this:

converting that to chappe code gives us:

all that's left is to grab the corresponding numbers of each symbol, which gives us "19 20 18 5 5 20 16 1 19 19".

converting that with a1z26 gives us our next answer: streetpass.