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.

Input: Consider Input: 3, 4, ['E', 'k', '4697', 'f', 'J', 's', '1265', '4673', 'D', '3345', 'n', '5593', '2249', '5951']

Output: f7964


Input: Consider Input: 1, 2, ['S', '7763']

Output: 3677S


Input: Consider Input: 13, 15, ['I', '4277', 'v', 'q', '5579', 'R', 'm', '1997', 'X', '2421', '6467', 'k', '8925', 'h', 'p']


Output: ph5298