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, 12, ['6769', 'R', '7805', 'n', '8083', 'p', 't', 'Y', 'i', 'W', 'x', '4127', '9475']

4127xWiYtp8083n7805R6769