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: 11, 18, ['O', '9153', 'q', '3965', 'R', 'm', '4045', 'k', 'g', 'R', '6791', 'F', 'k', 'R', 'c', '2031', '2021', '6953']

6791FkRc203120216953