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: 3, 18, ['D', '1251', '7683', '1491', '8717', 'x', 'J', 'F', '8545', 'J', 'C', '3915', 'x', '4157', '2247', '2613', 'v', '9347', '7807', '6061', '8817', 'Y', 'O']

768314918717xJF8545JC3915x415722472613v9347