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: 1, 20, ['s', 'M', 'd', '1467', '6159', '6687', '6461', 'z', '4519', 'v', 'y', '8291', 'e', 'G', 'H', 'v', '9245', '4097', '4123', '3851', '7901', '2241']

3851412340979245vHGe8291yv4519z6461668761591467dMs