Orange Gem Necklace : MM14
It seems you pressed the correct button.
It appears that the rule is based on the first letter of each word,
and the number corresponding to that letter, counting from the end of the word.
The first letter of Like is L, and L is the 12th letter of the alphabet.
When you count 12 letters from the end of the word Like, the result is L.
In the same way, the first letter of Share is S, which is the 19th letter.
Counting 19 letters from the end of the word gives H.
The first letter of Comment is C, which is the 3rd letter.
Counting three letters from the end gives E, so E is the correct answer.
You press the E button beneath the frame.
Soon, part of the wall beneath the buttons opens, revealing a treasure—
an orange gem necklace.
You take the treasure from the small hidden space inside the wall and secure it.
After obtaining the treasure, you leave the area.
You have exited the location.
You have successfully secured the treasure.
Congratulations!