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: 7, 10, ['4843', 'p', 'I', '8757', '2967', '7461', 'c', '2639', 'p', '8895']
Example Output: 5988p9362c

Example Input: 4, 20, ['H', '7451', 'X', 'i', '951', '1913', '9949', 'W', '4759', '1309', '1981', 'C', 'J', 'F', '4125', 'l', 'i', 'z', 'S', 'R', '5025', '5959', '1323', 'K', 'O', 'x', '5121', 'c', 'C']
Example Output: RSzil5214FJC189190319574W94993191159i

Example Input: 7, 14, ['O', 'f', 'M', 'O', 'e', 'B', '8545', '399', '4795', '3691', '7147', '5569', '6771', '7975', '4123', 'K', 'L', '4009']
Example Output:
5797177696557417196359749935458