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, 15, ['o', '7861', '5335', '835', 'e', '8077', 'd', '3099', 'F', 'q', 'C', 'F', 'M', '4715', '2669', 'D', '1517', '4361', 'e', 'v', 'P', '6813', 'q', '9075', '9997', '8799', 'L']

Ex Output:
96625174MFCqF9903d7708e53853351687o


Ex Input:
3, 4, ['6865', 'A', 's', 'o', '1989', 'i', '613', 'S', 's']

Ex Output:
os


Ex Input:
3, 25, ['L', '6983', '6453', '7781', '489', '6119', 'R', 'e', '3191', 't', '7821', 'z', 'q', 'b', '6027', 'W', 'x', 'p', '5947', 'H', '1999', '959', 'X', 'F', '4647', 'd', 'q', 'O', 'v', '7539']

Ex Output:

7464FX9599991H7495pxW7206bqz1287t1913eR911698418773546