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: 1, 19, ['N', 'l', 'E', 'k', 'l', 't', 'X', '9725', 'S', '979', 'j', 'U', 'W', 't', 'R', '8821', 'J', '1655', '6561', 'x', '5311']

65611655J8821RtWUj979S9725XtlkElN