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: 12, 20, ['7723', 'H', 'j', 'B', '779', 'l', '2389', '4095', 'G', '8533', '5751', '7325', 'T', '1025', 'Q', 'W', '3633', '1731', '1177', '7453', 'd', '6583', '3407', '1475', '4139', '5741']

7453117717313633WQ1025T7325