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: 21, 24, ['t', '3183', 'H', '2889', 'U', '1937', '4385', 'G', 'a', '3055', '4605', '2479', '7093', 'A', '7223', '7021', 'I', '3279', '4699', '4847', '7081', 'U', 'b', '1723', 'm', 'm', 'l']

7081Ub1723