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:
4, 6, ['U', '5099', '1125', 'U', '1693', '7717', 'P', '7679', 'E', '7747', 'D', 'Z', 'E', '4473']

Ex Output:
77171693U


Ex Input:
10, 10, ['u', 'b', 'B', '6579', 'X', 'E', 'e', '7989', '7839', '367']

Ex Output:
367


Ex Input:
3, 3, ['Z', 'I', '5293', 'q', 'L', '1563']

Ex Output:

5293