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, 10, ['7927', '8787', 'R', 'Q', 'm', '3999', 'x', '221', '7613', '3523', 'h', 'b', 'L', 'C', 'E', 'v', 'f', 'r', 'H', '9933', '3551', '7635']

35237613221x3999mQ