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: 6, 18, ['e', '6705', '8249', 'u', '1727', 'p', '1613', 'H', '221', 'D', '7889', '7477', '879', '5969', '4597', 'H', '1679', 'b', '5499', 'k', '7127', 'M', 'D', 'o', 'K']

b1679H4597596987974777889D221H1613p