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, 7, ['9065', 'Q', 'L', 'U', '6289', '1915', '1747', 'a', 'N', '9259', '4713', '7959']

Ex Output:
747151919826ULQ


Ex Input:
5, 9, ['D', 'o', 'D', '7569', '2797', '7801', 'T', 'N', '2223', '7379', 'Y', '9073', 'Z', 'c', 'S', 'a', 'R', '7403', '9927', 'O', '2715', '1133', '9897', 'U']

Ex Output:
3222NT10877972


Ex Input:
4, 20, ['9157', 'd', '7573', '4525', 'L', 'b', '3925', 'p', 'n', 'X', 'l', '6131', 'Q', 'A', 'K', '1713', '7895', 'K', '9385', 'a', '2947']

Ex Output:

a5839K59873171KAQ1316lXnp5293bL5254