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, 20, ['H', 'S', 'F', 'G', 'A', 'm', '5923', 'g', 'm', 'S', 'l', 'B', 'O', '261', '5319', '8211', 'Y', 'n', '1961', 'W', '8229', '6967', '2433', '3017', 'c', '7759', 'f', 'q', '8603']

SlBO26153198211Yn1961W