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, 15, ['S', '1103', '9597', 'a', '2315', '8243', '1467', '7871', '3145', '1927', 'a', '9661', 'c', '9641', 'O', '8889', '5367', '8789', '4845', 'C', '8443', '3819', '2141', '61', '7657', 'R']

9661c9641O