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: 13, 17, ['k', 'f', 'C', '1551', 'Y', '2149', 'r', 'R', '5875', 'C', 'Y', '2145', 'O', 'b', 'M', 'y', '7407', 'X', '1227', 'F', 'n']

Output: 7047yMbO


Input: Consider Input: 2, 4, ['5983', 'I', '9531', 'U', 'P', '1383', 'Y']

Output: U1359I


Input: Consider Input: 4, 16, ['1015', '7013', '1519', '6289', 'l', '7179', '6285', '421', '4339', '5229', 'g', '805', '825', '4057', 'U', 'B', '1435', '5225', 'M', 'k', 'v', '5015', '2429']


Output: BU7504528508g9225933412458269717l9826