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, 27, ['7195', 'b', '53', '8415', 'I', 'D', 'q', '3403', 'J', '129', '2331', '5621', '6005', '3653', 'H', '1061', 'x', '6845', '6945', 'R', '5197', '8163', 'K', 'W', '3781', 'W', '6893', 'F', '6719']

6893W3781WK81635197R6945