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: 20, 23, ['K', 'T', '5995', 'Y', 'w', '8855', 'Y', 'R', '8583', 'b', 'I', '5467', 'b', 'b', '7455', 'Z', 'W', 'b', 'U', '9091', 'O', 'P', '57', 'd', 'A', 'n', 'H']

57PO9091