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.

Input: Consider Input: 2, 7, ['9969', 'u', '9811', 't', 'z', '8347', 'i', 'O', '5897']

Output: i7438zt1189u


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

Output: 937939311372302


Input: Consider Input: 2, 7, ['j', 'U', 'n', '5393', 'U', 'H', 'j', 't', 'm', '2397', 'Y', '1753', 'T', '6443', 't', '797', '9701', 'o', 'c', 'H']


Output: jHU3935nU