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, 21, ['7969', 'G', '8229', '6189', 'D', '165', '7367', '8435', '1151', 'b', '2093', '3097', 's', '6195', '6701', '1959', 'g', '7055', '79', 'N', 'R']

RN797055g1959