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: 6, 20, ['k', '3879', '3497', '3141', '1181', '1621', '8485', 'P', 'F', '1963', '6387', '8505', '6007', '8207', 'M', 'O', 'W', 'M', 'a', '4527', '6707']

16218485PF19636387850560078207MOWMa4527