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, ['S', 'm', 'j', '6193', '79', '9401', '2469', '7919', '9563', 'l', 'm', 'A', '983', 'M', '6661']

Ex Output:
mS


Ex Input:
4, 11, ['H', 'E', 'l', '5011', 'R', '2693', '1081', '9825', '8503', '213', '2717', '8335', '3355', 'd', '7727', '3417', 'R', 'V', 'e']

Ex Output:
71723123058528918013962R1105


Ex Input:
2, 4, ['5983', 'I', '9531', 'U', 'P', '1383', 'Y']

Ex Output:

U1359I