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: 1, 9, ['u', 'f', 'Q', 'z', 'Y', 'x', '1237', 'T', '5395', 'E', 'D', 'E', 'd', '2319', '8825', '711', '6667', '3109', 'b']
Example Output: 5935T7321xYzQfu

Example Input: 2, 3, ['2661', 'T', '8855', 'I', 'f', 'P']
Example Output: 5588T

Example Input: 3, 20, ['W', 'E', '2135', '153', '3581', '3611', 'D', 'Y', '3363', '463', '6885', '3475', 'j', 'B', 'O', '3795', '5145', 'o', '5809', '5883']
Example Output:
38859085o54155973OBj574358863643633YD116318533515312