Past na pap of pion: This phrase likely hints at the letters that need to be decoded. "Past" might indicate moving letters a certain number of positions in the alphabet (Caesar cipher). "Na pap" could be a jumbled word that gives a clue about the key for the cipher. "Pion" might refer to the last letter (pi) being important.
3 letters: This suggests that each group of ciphertext (encrypted text) corresponds to a 3-letter word in the plaintext (original message).
Here's a general approach you can take to solve a cryptogram:
Identify any patterns in the ciphertext. Are there repeated letter combinations?
Look for common 3-letter words in the language and try substituting them into the ciphertext.
If you can decipher a few words, use them to guess the key for the cipher (number of positions to shift letters).
Keep filling in words and refining your guesses until you crack the entire message.
Remember, cryptograms can be challenging, so be patient and persistent!