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, 18, ['6205', 'v', '5673', 'M', 'g', '8239', '4965', '1673', '6629', 'y', 'L', 'x', '5123', 'k', 'o', '9155', '649', 'f', 'E', '1447']

f6499155ok5123xLy6629167349658239gM5673