In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

8, 9, ['s', 'X', '6737', 'M', 'm', 'N', 'a', 'Q', 't']
tQ

4, 4, ['8393', '8873', '6317', 'N', '2549']
N

1, 1, ['977', '1287']

779