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: 1, 21, ['2291', 'p', '4293', 'P', '87', 'y', '6361', 'b', '1665', '9705', 'g', '3097', '431', '5029', '8227', '6795', 'x', '8235', 'S', 'k', 't']

tkS8235x6795822750294313097g97051665b6361y87P4293p2291