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: 4, 5, ['B', 'H', 'y', 'y', 'K']
Example Output: Ky

Example Input: 4, 11, ['H', 'E', 'l', '5011', 'R', '2693', '1081', '9825', '8503', '213', '2717', '8335', '3355', 'd', '7727', '3417', 'R', 'V', 'e']
Example Output: 71723123058528918013962R1105

Example Input: 7, 8, ['Z', '6143', '9967', '4801', 'k', '6699', 'g', 'k', 'S', 'i', '3145']
Example Output:
kg