Creating mental exercises is fun

Answering puzzles is a good exercise for the mind. In fact, experts recommend this type of mental activity for those who want to keep their minds sharp, especially when they are already in advanced age.

Lately though, my Dungngo and I discovered that creating puzzles is far more fulfilling than just answering published ones. And it is more enjoyable, too, especially when we take turns answering each other's puzzle. Our laughter as we tease each other when one of us finds it hard to answer the other’s puzzles, and our squeals of delight when we are able to answer them, echoes loud and clear into our minds even long after we have found other things to amuse ourselves on.

One of our favorite is encrypting and decrypting codes. Here is one of the codes I made for him to decrypt:


MCK0113C 02G01OP EJ1519G UP

Clues for the first phase:
1. Numbers always come in pairs (2 digits). A pair represents a letter. Figure out the rule.
2. A letter belonging to the A-J string represents the second letter to its left in the alphabet.
3. A letter belonging to the K-T string represents the third letter to its right in the alphabet.
4. A letter belonging to the U-Z string represents itself.

Decoded message (which is also a code): ____________________________


Clue for the second phase of the decoding process:

O, goddess of the wilderness, keeper of the key
The cleverest of preys surrenders to thee
Legend has it that poinsettia nursed in thy bosom
And to thy calmness and peace, the sun comes home.

Decoded message (Final Answer): _________________________