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: 6, 10, ['3433', 'a', 'U', 'R', 'S', 'Q', '989', '561', 'T', '7687', '2929', 'X', '3305', 'y', '6705', '1009', '315', '339', 'K', 'P']

Q989561T7687