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: 12, 16, ['661', '9509', 'J', 'Y', 'p', 'h', '2797', 'F', '2255', 'm', '5777', 's', '2705', 'M', 'H', '4923', 'O', 'A', '1851', '2665', '8309']

s2705MH4923