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 find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output 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. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.
Input: 4, 27, ['n', '3789', 't', 'd', 'A', 'g', 'P', 'M', '7917', 'W', 'G', 'm', '351', '9149', 'U', '8969', 'n', '615', '9427', 'P', '7425', '2499', '169', 'I', '9733', 'a', '1511', 'h', '6893', 'j']

1511a9733I16924997425P9427615n8969U9149351mGW7917MPgAd