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: 1, 4, ['63', '5429', '5563', '2045', '875', '7163', '1869']

Output: 54023655924536


Input: Consider Input: 4, 4, ['8393', '8873', '6317', 'N', '2549']

Output: N


Input: Consider Input: 1, 4, ['a', 'H', '4073', '8653']


Output: 35683704Ha