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.

Ex Input:
3, 5, ['2849', 'J', 'L', '2347', '7219', 'a', 'Q', 'U', '6865', 'O']

Ex Output:
91277432L


Ex Input:
2, 4, ['i', '2555', 'G', '4549', 'a', '7443', '5361']

Ex Output:
9454G5552


Ex Input:
11, 13, ['9423', '847', '629', '3163', '1333', '8835', '7353', '2387', '2565', 'R', 'M', '4457', 'h', 'T', 'v', '2771', 'a']

Ex Output:

h7544M


