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: 15, 20, ['2745', '7909', 'P', 'j', '6549', 'Y', 'x', 't', '5133', '4919', 'l', '4849', '1289', 's', '4405', 'G', '3543', 'J', 'K', 'L', 'V']

4405G3543JKL