Write a program that repeatedly reads integers from the user until the user enters the word \\\\\\\'stop\\\\\\\' (this is called a sentinel value). When the user enters the sentinel value, output the following statistics about the sequence of integers: sum, average, sum of even numbers, and the largest number.

For example: Enter a sequence of integers. Enter \\\\\\\'stop\\\\\\\' to exit.

> 1

> 3

> 1

> 3

> 4

> 9

> 3

> stop

Sum: 24

Average: 3.4285714285714284

Even Sum: 4

Largest number: 9