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, 4, ['5983', 'I', '9531', 'U', 'P', '1383', 'Y']

Ex Output:
U1359I


Ex Input:
6, 6, ['X', '939', 'u', 'V', 'Z', 'x', 't', '5703', '5669', 'z', 'D', '7013', '9807', 'N', 's', '5075', 'd', 'T', '1275', '1475', 'r', 'k']

Ex Output:
x


Ex Input:
2, 8, ['5333', '1995', 'v', '9869', 'T', '7583', 'U', '9717', '9029', '5239']

Ex Output:

7179U3857T9689v5991