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: 16, 20, ['5551', '8191', 'c', '8289', 'x', 'n', '4873', '8909', '7295', 'K', '4629', '9159', 'C', '2733', '4825', '7723', 'p', '7253', '4423', 'B']

B44237253p7723