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:
4, 8, ['g', '6711', '6701', 'p', '6345', 'W', '9953', '3185', 'W']

Ex Output:
58133599W5436p


Ex Input:
4, 9, ['2731', '4987', '2927', '8573', 'O', '8349', '9507', 'K', '7307', 'V']

Ex Output:
7037K70599438O3758


Ex Input:
3, 17, ['3049', '4593', 'b', '5597', 'N', 'A', '6953', 'x', 'C', 'i', 'w', '3769', 'a', 'a', 'W', 'I', '9725']

Ex Output:

5279IWaa9673wiCx3596AN7955b