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, ['6717', '6639', 'l', 'i', 'o', '1819']

Ex Output:
9181oil9366


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:
1, 5, ['K', '2085', 'Q', '5579', 'w', '9545', '1619', 'X', 'O', 'o', '2027', '9647', 'a', '6237', 'W', 'S', 'v', 'A', '569', '3907', 'E', '7563']

Ex Output:

w9755Q5802K