Enter the key from Problem 2's side challenge
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There is a famous mathematical constant that equals the ratio of any circle's circumference to its diameter.
It starts with 3.14159... and its digits go on forever.
This constant is named after a Greek letter. When you spell the name in English, it's only two letters long.
What is the FIRST letter of this constant's English name?
Hint: Every circle uses this constant. Its name starts with the letter you need.
How many zeros are in the number one million (1,000,000)?
The answer is your key to unlock Problem 4