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:
10, 19, ['6733', 'q', '2197', 'h', '9975', '3059', 'e', '8475', '281', 'L', '9119', 'B', '8857', 'U', 'R', 'h', 'e', 'J', 'P', 'l']

Ex Output:
PJehRU7588B9119L


Ex Input:
9, 17, ['q', 'L', '2499', 's', 'P', 'e', 'C', '2667', '4561', '9953', '9901', '61', '3901', '3237', '1169', '5841', 'E', '8981', 'Q', 'W', 'B', '5513', 'F', 'D', 'g', '5463', 'v', '931', 'P']

Ex Output:
E148596117323109316109935991654


Ex Input:
1, 1, ['9675', 'e', '4343', '8021']

Ex Output:

5769