The title problem sounds extremely confusing; however the actual puzzle that we’re talking about is rather simple. If you follow these steps correctly, no matter what number you pick, you will always end up with the number 4 in as few as 5 steps or less. By the way, you have to spell the numbers in English for this to work!
Here are the steps: Pick a number between 1 and 99, and write it as a word, and then count the letters. However many letters you counted is the new number you must write. Write that number down, and count the letters again, and so on and so on. Within 5 numbers, you will end up at the number 4 every time! Try it!