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, 17, ['r', 'G', '1727', 'b', 'I', '3679', 'f', '1991', 'L', 'q', '9105', '2803', 'R', 'd', '1959', '3621', 'H', 'q', 'Q', 't', 'r', '729', 'R', '3725']

H36211959dR28039105qL1991f3679