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: 15, 20, ['H', 'f', '3719', 'y', '7847', 'Y', '5559', '6465', 'B', 'a', 'k', 'r', 'n', '8919', '9', '5037', 'Q', 's', 'v', '8587', '4615', '4257', 's', 'S', 'Q', 'X', '7217', '6241']

95037Qsv8587