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: 7, 20, ['T', '7527', 'z', '9263', '4735', 'w', 'n', '5335', '6853', '5107', '8431', 'G', 'f', '1863', 'J', 'J', '4603', 'R', 'W', '3049', 'o', 'g']

3049WR4603JJ1863fG8431510768535335n