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: 13, 21, ['7539', '189', '6671', 'I', '9479', 'C', 'h', 'q', 'H', '357', 'R', 'I', '967', '6461', '6253', '6381', '7157', '4493', '6371', 'A', 't', 's', 'C', '2357']

tA637144937157638162536461967