Create a function that returns the string "Burp" with the amount of "r's" determined by the input parameters of the function.
long_burp(3) ➞ "Burrrp"
long_burp(5) ➞ "Burrrrrp"
long_burp(9) ➞ "Burrrrrrrrrp"num to always be >= 1.return the result.