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: 18, 19, ['f', 'B', 'K', 'X', 'H', 'v', 'e', 'D', 'S', '7497', 'J', '8021', 'Z', '5011', '5765', '6123', 'U', 'e', '3961', 'r', 'z', '5145', '3935', '299', '5457']

e3961