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: 15, 26, ['7801', 'g', '5129', 'a', '3279', 'F', '5609', 'U', '7087', 'P', '4163', '7253', '2475', '1705', 'j', '5939', '7955', '8611', '1461', '1521', '957', '7701', '757', '8269', 'S', 'U', '8791']

US8269757770195715211461861179555939j