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: 8, 12, ['j', 'F', '5867', '1781', 'y', 'T', '4145', '3571', 'F', 'K', 'x', 'K', 'E', '8487', '4319', 'B', 'P', 'R']

3571FKxK