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: 3, 15, ['2651', '9687', 'j', 'G', 'F', '6293', 'u', '8821', 'r', 'p', '1523', '4333', '27', 'f', '6085', 'X', '6579', 'J', '8801', '7563']

6085f2743331523pr8821u6293FGj