Definition: 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.
Input: 4, 11, ['f', '17', 'u', '1931', 'C', '7159', 'f', '5127', 'o', 'f', '6481', '9127', '3279', 'U', '1719', 'g']

6481fo5127f7159C1931