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: 3, 20, ['x', 'o', 'b', 'L', '1895', 'Z', 'W', 'I', 'D', '4831', '8907', '5567', '6135', '241', 'M', 'i', '871', 'J', 'Q', '7255', 'L', '3165', '6471']

7255QJ871iM2416135556789074831DIWZ1895Lb