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: 12, 21, ['g', 'e', 'T', '7231', 'P', '1853', 'k', '3359', 'L', '6047', 'A', '8187', '135', 'R', '7065', 'Y', 'j', '911', '7031', '6629', 'H', 'y', '4763']

H66297031911jY7065R1358187