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, ['x', 'S', 'u', 'T', '2793', '3459', 't', '4539', '7545', '6427', 'O', '6891', 'D', '9799', 'h']

t453975456427O6891