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, 8, ['Y', 'f', '6173', 'i', '7647', '649', '9623', 'a', '8591', 'n', 'D', '873', 'J', '2709', '405', '7757', 'p', '2405', '5399', 'D']

6499623a