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:
2, 12, ['p', 'o', '2673', 'd', 'r', 'n', 'Z', 'u', 'm', '5195', '6521', '7671']

Ex Output:
176712565915muZnrd3762o


Ex Input:
9, 9, ['5503', 'f', 'g', 'B', '3003', '229', '4613', 'C', 'j', 'o']

Ex Output:
j


Ex Input:
3, 5, ['7341', '6251', 'R', 'F', 'O', '4665', 's', '6345', 'n', '8757', '1769', '7937', '2955']

Ex Output:

OFR