**Exercise 3.**
This software does the following. For each pair of elements \(a\) and
\(b\) from \(U(n)\), print out \(|a|\), \(|b|\), and \(|ab|\) on
the same line. Assume \(n < 100\). Run your program for \(n\)= 15, 30
and 42. What is the arithmetic relationship between \(|a|\), \(|b|\),
and \(|ab|\)?

Please enter \(n\) and click the button.