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: 20, 27, ['5597', 'd', '7663', '4131', '8769', 'n', '5023', 'E', 'x', 'c', '983', 'Q', 'z', 'i', 'f', 'i', '435', 'G', '7989', 'Q', 'o', '5601', 'a', 'W', '2443', 'f', 'y']

yf2443Wa5601oQ