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, 3, ['5191', '9077', 'a']

Ex Output:
a7709


Ex Input:
7, 8, ['4367', '4367', 'm', '5681', '931', '9039', '8313', '6335', 'w', 'd', 'V', '1741', '1703', 'I', 't', 'a', 'P', 'P', 'x']

Ex Output:
53363138


Ex Input:
4, 10, ['5671', 'h', 'L', 'U', 'I', '2585', 'l', '5013', '9375', '619', '653', 'x', 'j', '4685', '7187', 'z', '5711', 'C']

Ex Output:

91657393105l5852IU