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 concatenate all elements of A from the ith element to the jth element, and print 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.
Input: 8, 18, ['i', 'f', '8407', '6813', '863', '63', 'p', '2847', '6977', 'q', '6691', '4265', '1761', 'u', '3097', '9769', '6385', '3991', '9745', '4197']

28476977q669142651761u3097976963853991