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: 2, 5, ['n', '8897', '6611', '2857', 'p']
Example Output: p758211667988

Example Input: 2, 2, ['6099', 'r']
Example Output: r

Example Input: 4, 19, ['6507', 'B', '8021', 'i', '1289', 'v', '5169', '6969', '5687', '4397', 'a', '4945', 'T', 'q', 'x', '6979', '3115', 'h', 'R', '4925', '2877', 'x', 'E', '7245', '1235', '7019']
Example Output:
Rh51139796xqT5494a7934786596969615v9821i