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, 8, ['k', '59', 'Q', 'b', 'N', '5153', 'm', 's', '1703', 'i', 'E', 'x', '4727', '9723', '9305', '8843', '5295', '4281', '555']
Example Output: sm

Example Input: 15, 16, ['4531', 'a', 'I', 'W', '1071', '1301', 'v', 's', '3521', '7203', '1157', 'w', '7201', 'a', 'I', 'z', 'V', 'X', 'j']
Example Output: zI

Example Input: 2, 18, ['g', 'A', 'c', 'C', '7371', '9835', 'I', '269', 'j', '8295', 't', 'z', 'B', 'a', 'f', '3105', 't', '2121']
Example Output:
1212t5013faBzt5928j962I53891737CcA