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:
1, 2, ['3303', '6127']

Ex Output:
72163033


Ex Input:
1, 5, ['E', 'h', 'N', '9931', 'F', '9367', 'N', 'K', 'Y', '1449', '8503', '9277', 'k', '9627', 'Q', 'v']

Ex Output:
F1399NhE


Ex Input:
17, 19, ['c', 'U', '5141', '5579', '4871', 'T', 'o', 's', 'M', 'd', '8155', 'p', 'f', '1289', 'e', '7815', 'y', '625', '7347', '7537']

Ex Output:

7437526y