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: 2, 7, ['Z', 'N', '249', 'F', 'd', '3639', 'r', 'K', '515', 'C', 'c', 'm', 'M', 'P', 'b']

N249Fd3639r