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: 12, 12, ['6909', '7733', 'L', 'p', '6481', 'W', 'p', 'u', '4123', '911', 'H', '6393']

6393