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

Ex Output:
ut1962d


Ex Input:
13, 16, ['a', 'y', 'd', 'F', 'P', '8965', 'G', 'V', 'W', 'y', '4275', '7653', '5643', '321', 'u', '721', 'm', '1483', '3321', '3851', '6373', '9445', '1193']

Ex Output:
127u1233465


Ex Input:
2, 5, ['3057', '9039', '2921', '7397', '6373', 'D']

Ex Output:

3736793712929309