using python

3. Write a loop that will iterate over a list of items and only output items which have letters inside of a string. (2.5 points) Do this by first writing a function contains_onlyletters(word) that returns true if it contains letters only and false otherwise. (2.5points) Total 5 points Take the following list, for example, only "John" and "Amanda" should be output: >>> names = ['John', , 'Amanda', 5]