For anyone struggling (3 letters and a face)

Thanks for the hint Hjaw123, defiantly required.

Not logical :( Was able to guess with the hint above.

Hint is needed.

Hi!
Here's some help:

Above R6, it writes the word JOY
Below R6, a smiley face.
R7 --> C5 and C7
R8 --> C3, C6 and C9
R9 --> C4 and C8
R10 --> C5 to C7

Hope it helps!