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: 5, 15, ['2717', 'Y', '4065', '7577', '2759', 'x', 'l', 'B', 'o', '7585', 'U', '6411', 'x', 'T', 'x', '2863', '3207', '3303', '3737', '7577', 'R']

2759xlBo7585U6411xTx