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, 3, ['2119', '2237', 'O']
Example Output: O73229112

Example Input: 2, 6, ['415', '3603', 'l', 'C', '9471', 'z', '4087', 'Y', 's']
Example Output: z1749Cl3063

Example Input: 5, 6, ['P', '8783', '3775', 'R', 'q', 'p', '5045', '4989', '2921']
Example Output:
pq