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.

2, 19, ['C', 'D', 'C', 'Z', '3843', 'j', 'T', 'o', '9147', '2915', 'n', 'N', '939', 'S', '2457', '7789', 's', 'z', 'V']
Vzs98777542S939Nn51927419oTj3483ZCD

4, 7, ['3421', '6129', '593', '203', '2731', '1393', '9739', '1087', '3453', '1389', 'W', 'D', 'b', '9261']
937939311372302

9, 18, ['t', '1957', '3933', '6257', '7311', '9151', '5221', 'l', '2507', '6149', 'Z', '2385', 'N', '81', '1139', 'D', 'O', 'K', 'L', '379', '8335', 'D', '1141', 'S', '3797', 'f']

KOD931118N5832Z94167052