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, 6, ['1467', 'm', '9771', '6533', 'm', 'x', 'c', 'd', '3139']

Ex Output:
xm33561779m


Ex Input:
19, 28, ['2809', '2943', '209', 'I', '4961', 'z', '6499', 'j', '8323', 'v', '6955', 'E', '2591', '5523', 'D', 'j', '3929', 'L', '501', 'Y', 'e', 'p', 'F', '1073', 'o', '3531', '9245', 'K']

Ex Output:
K54291353o3701FpeY105


Ex Input:
9, 9, ['2885', 'h', 'k', '399', '8171', '8763', '6927', 'J', '5183', '953', '4815']

Ex Output:

3815