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: 7, 12, ['1465', 'T', 'f', '5057', 'f', '8807', '9885', 'H', 't', 'v', '545', '6273', '727', 'j', 'o', '165', 'F', 'v', '449', '3665', 'e', '135', '5533', '9351', '9153', 'U', '7137']

6273545vtH9885