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.

3, 5, ['q', 'G', '9871', '3427', 'Q', '1993', 'H']
Q34279871

1, 2, ['U', 'G', 'N']
GU

4, 12, ['2853', '7823', 'i', '3739', '9259', 'M', '8335', '5171', '9553', 'G', '5851', '5213', 'f', '6283', '2021', 'y', 'k', 'w', 'B', 'H']

52135851G955351718335M92593739