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: 4, 6, ['K', '3155', '3653', 'L', '1045', '8511', 'v', '1491', 'V', 'P', '6129', 'd', '5643', 'K', 'j', 'Q', 'f', 'R', '4445', '1571', 'M', '1609', '8977']

85111045L