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: 5, 18, ['4217', 'B', '7021', 'p', '7881', 'q', '6733', 'u', '4725', 'g', 'Z', '9669', 'U', 'U', 'V', '4177', 'w', 'c', 'R', 'h', '1949', 'p', 'i']

cw4177VUU9669Zg4725u6733q7881