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, ['4303', 'u', 'b', 'D', '3015', '6703', '2245', '1377', '4409', '1573', '7709', '3773', 'D', '4793', '1925', '9867', '3181', 'Z', '4613', 'Y', 'Q', '4203']

Y4613Z318198671925