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: 9, 21, ['843', '7731', '9387', 'H', 't', '1701', 'U', '1839', '8353', 'l', 'V', 't', 'T', 'g', '7887', 'c', '9895', '8941', '555', 'B', '8317', '4823', '6765', 'e', 'v']

8353lVtTg7887c98958941555B8317