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: 6, 19, ['3827', 'j', 'b', '5969', '1745', 'C', 'm', 'D', 'P', '139', 'e', '6609', '4771', '959', '2517', '6867', '2495', '4113', 'r', '7935', 'M', '4027', '3051', 'V', '1405']

r411324956867251795947716609e139PDmC