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: 11, 18, ['l', '981', '9927', 't', '6901', '9001', 'l', '5071', '6429', 'z', 'f', '5129', '741', 'A', 'r', '157', 'H', 'M', '2029', 'x', '8621', '1847']

MH157rA7415129f