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: 7, 12, ['6613', 'O', 'g', 'Y', '6115', '3527', '1921', 'z', 'U', '7233', '4793', 'c', 'W', 'y', '1245', '4121', '5729', 'y', 'L']

1921zU72334793c