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.
11, 12, ['6217', 'E', '7519', 'B', 'M', '8641', '9909', 'p', 'w', 'q', 'f', 'E', 'W', 'q', 'E', 'k', 'I', '3783', 'R', '6811']