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: 15, 20, ['3179', '7807', '6989', 'Q', '2889', '2559', '5233', '1945', '8341', '2929', '2065', 'M', 'u', '4793', 'j', 'b', 'l', 'T', '1065', '2481', 'i', 'W']

24811065Tlbj