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, 8, ['X', 'K', '3639', 'i', '3613', '1385', '8403', '8319', 'i', '8511', 'f', '4111', 'A', '7001', 'P', 'M', 'N', '6253', '4029']

3613138584038319