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: 5, 14, ['C', 'O', 'j', '8687', '2287', '8935', '5949', 'b', '3957', '4181', 'W', 'X', 'v', '1973', 'a', '3155', '3613', '8321', 'D', 'B', 'u', 'b']

228789355949b39574181WXv1973