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: 13, 15, ['a', 'H', '7025', 'J', 'K', 'e', '7977', 'Z', 'Z', '7577', '6673', '8911', '7703', 'W', 'O', '5389', 'q', '9363', '7121']

7703WO