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: 4, 4, ['I', 'i', 'b', '2703']

Output: 3072


Input: Consider Input: 2, 6, ['6717', '6639', 'l', 'i', 'o', '1819']

Output: 9181oil9366


Input: Consider Input: 7, 14, ['g', 'o', '6171', 'S', '695', 'A', 'i', 'z', '1693', '2205', 'E', 'u', '1985', '2667']


Output: 76625891uE50223961zi