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: 7, 10, ['3633', 'B', '6697', '1967', '5649', '2739', '6139', '7423', '1731', 'P', '6993', '9665', 'l', 'n', 'h', 't', 'A', '1919', 'X', '9987', '2401', '1965']
Output:
613974231731P