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, 12, ['2851', 'v', '8871', 'Z', '2227', 'm', 'z', 'B', 'v', '765', '1435', 'V', 'X', 'k', '5955', '2549']

Ex Output:
V5341567vBzm7222Z1788v1582


Ex Input:
8, 13, ['7725', '8399', 'P', '9663', '4059', '5265', '1703', 'I', 'E', '1587', 'X', 'N', 'W', 'K', 'j', 'R', 'P']

Ex Output:
WNX7851EI


Ex Input:
7, 9, ['A', 'v', '7933', 'v', '5037', 'w', 'a', 'p', '903', '7671', '3801', 'n', '5741', '8549', 'E', 'f', 'r', '6281', '8885', 'N', '3137', 'K', '3785', '5375', '5705']

Ex Output:

309pa