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: 7, 21, ['8625', 'A', 'n', '4761', 'N', '2617', '4881', 'I', '1743', '8023', 'G', '2947', '2559', 'y', '2967', 'w', '6447', 'E', 'F', 'e', 'y', 's']

yeFE6447w2967y25592947G80231743I4881