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: 16, 21, ['8073', 'R', '8057', 'S', '6463', 'p', 'f', '4837', '2687', 'u', '2987', 'G', 'x', 'V', 'u', '8593', 'Q', 's', '4805', '2811', 'U', 'w', 'J', 'W', 'e', '863', '8769', '827']

8593Qs48052811U