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: 5, 20, ['Q', '9689', 'l', 'k', '1779', '9563', 'j', '2237', 'E', 'L', '6535', 'X', 'L', 'T', 'u', 'k', '8465', '1581', '3547', 'C', '7349', '6645', 'm']

17799563j2237EL6535XLTuk846515813547C