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:
1, 3, ['5231', 'n', '6293', '4509', 'w', '545', '4403', '961', '3213', 'y', '715', 'Z', 'd', 'O', 'U', 'e', 'L', '8375']

Ex Output:
3926n1325


Ex Input:
4, 10, ['6935', '8323', '6167', 'I', 'G', 'f', '303', '3387', '3257', '3069', 'q', 'r', '187', 'k', '6031', '8221', '721']

Ex Output:
960375237833303fGI


Ex Input:
7, 21, ['2547', 'y', '8589', 'A', 'z', '3865', 'j', '8093', '6299', '4147', '1221', 'A', 'F', '2645', '1789', '1301', 'F', 'o', 'b', 'G', '441']

Ex Output:

144GboF103198715462FA1221741499263908j