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: 2, 8, ['621', 'R', '6131', '5173', 'T', 'T', 'I', 'X', '8463', '6879', '7111', 'y', '4865', 'F', '4491', '4867', 'S', '7169', '4919']

XITT51736131R