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: 19, 26, ['R', 's', '3999', 'r', '6343', 'H', 'R', 'q', 'f', 'G', 'E', 'L', 'p', 'm', '7755', 'F', '3349', 's', '6989', '685', '5853', '265', 'a', '9345', 'r', 'x', '295']

xr9345a26558536856989