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.

Ex Input:
6, 7, ['753', '4657', 'h', '13', '593', 'I', '7689', '717']

Ex Output:
9867I


Ex Input:
2, 5, ['f', 'd', '2691', 't', 'u']

Ex Output:
ut1962d


Ex Input:
8, 8, ['2917', 'F', '8195', 'h', '5941', 'E', '9419', 'H']

Ex Output:

H