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: 10, 19, ['R', 'p', 'Y', 'c', 'l', 'f', 'b', '4577', '4687', '7461', 'j', 'K', 'n', 'x', '7631', 'j', '6813', '8079', 'p', 'X', '1851']

7461jKnx7631j68138079p