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.

3, 6, ['643', 'X', 'F', '7453', '8495', '7943']
349759483547F

7, 8, ['8275', 'o', 'f', '6403', '7399', 'M', 'E', '7879', 'e', 'L', 'F', '2019']
9787E

9, 13, ['5933', '7881', '3935', '5967', 's', 'K', 'u', '9785', 'k', 's', 'Z', 'M', 'Y', '2517']

YMZsk