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: 12, 19, ['E', 'Z', '3855', 'X', 'D', 'X', 'p', 'c', '9885', '7589', 'r', 'e', '3491', 'v', '5649', '1933', 'R', '8455', '6811', '7439', '9645', 'W', 'a', '8101', '8975']

68118455R19335649v3491e