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, 18, ['N', 'c', 'D', '9015', '2391', '3841', 'f', 'Q', 'h', '2611', '5663', 'b', '2427', 'E', 't', '7145', 'X', 'Y', '2633', 'M', '8197', '9553', '719', '2151', 'j', '165', 'z']

YX7145tE2427b56632611hQf384123919015