In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

Ex Input:
3, 12, ['n', '1995', '9023', '6583', 'e', '1551', '1189', '451', 'I', '9021', '9823', '2777', 'u', '9695', 'p', 'C', '3255', '79', '6763', 'a']

Ex Output:
277798239021I45111891551e65839023


Ex Input:
3, 4, ['P', '7535', '9919', '5299', '8521', 'q', 'q', 'i']

Ex Output:
52999919


Ex Input:
4, 9, ['t', '3545', 'S', '1635', 'Q', '2851', 'Z', 'A', '391', 'R', '3773', '8909', 'A', '255']

Ex Output:

391AZ2851Q1635