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

Output: 937939311372302


Input: Consider Input: 2, 4, ['5983', 'I', '9531', 'U', 'P', '1383', 'Y']

Output: U1359I


Input: Consider Input: 2, 6, ['1309', '8875', 'C', 'y', '1029', '1231', '51', '4759', '7565', '9949', 'G', '1427']


Output: 13219201yC5788