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:
7, 8, ['9287', 'V', 't', 'W', 'W', 'w', 'N', 'T', 'Y']

Ex Output:
TN


Ex Input:
6, 7, ['6177', 'x', '2623', '4069', 'U', 'l', 'K', 'F', '5083', '155', 'O', '8467']

Ex Output:

Kl