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: 3, 19, ['R', '5223', 'b', '239', 'g', 'S', '7747', 'B', '8213', 'w', '1575', '3593', '2191', 'y', 'o', '4973', 'd', 'i', '1551', '6541', '5975', '719', '8901', '9641', 'I', '919', '2779']

1551id4973oy219135931575w8213B7747Sg239b