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: 2, 9, ['8491', '9069', 'U', 'i', '2907', '6431', 'v', '4883', '6713', '5549', 't', 'b', 'i']

9069Ui29076431v48836713