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: 5, 11, ['K', '4919', 'I', '9893', '311', 'q', '7073', '5449', '1945', 'D', '4519', 's', '5397', '8687', 'X', '5921', 'w', '1911', '9973', '4679']

4519D194554497073q311