Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant string. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
Input: 6, 9, ['I', 'C', '2837', 'j', '1009', '7217', 'Q', 'U', 'Q', 's', '285', '9787', '7293', 'E']

7217QUQ