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: 4, 13, ['6729', 'u', '8437', '3573', '5367', '2101', '3105', 'u', '5087', '5871', '9969', 'b', 'd', '3349', 'n', 'D', 'Z', 'r', 'm', '899', '2355', 'H', '7891']

3573536721013105u508758719969bd