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, ['n', '451', 'i', 'v', 'S', '5249', 'c', '8119', '2307', 'I', 'J', 'E', 'b', '7557', 'e', '9401', '5679', 'R', 'R', 's', '9493', 'v', 'Z', 'M', '5551']

56799401e7557bEJI23078119c5249