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.

Example Input: 3, 10, ['s', '3299', 'K', 'D', '4621', '9075', 'K', '6987', 'S', '9829', 'm', 'I', '3797']
Example Output: 9289S7896K57091264DK

Example Input: 1, 14, ['d', 'Y', 'G', '5849', '6425', 't', '7727', '7863', '131', '6013', '9683', 'Z', 'n', 'y', 'U', 'g', '8675', '1377', 'L', 'u', '6811']
Example Output: ynZ3869310613136877277t52469485GYd

Example Input: 4, 12, ['U', 'M', 'x', '5379', '1719', 'C', '1073', '1807', '2061', 'u', 'H', 'U', '103', 'U', 'y', '7117', '4557', '7095', 'h', 'E', '4369', '9983', 'j', 'Q', '6955']
Example Output:
UHu160270813701C91719735