We have intercepted a message that we need to decode. Luckily, we know that they use the letters A to Z, space, 0 to 9. We also know that when they encode messages they start by shifting once to the right, then left twice, then right 3 times, then left 4 times etc.
a. If the message intercepted was DMPLZNLJ, what was the original message?
b. What would we get if we encoded COMPUTER using the given algorithm?