instruction:
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.
question:
9, 13, ['1021', '3241', 'n', 's', '2629', '3551', '2853', '5549', '485', '9195', '3175', '6445', 'D', '2839']
answer:
485919531756445D


question:
6, 6, ['6237', '5511', '7211', '1509', '7331', '9547']
answer:
9547


question:
3, 10, ['b', 'v', '3217', 'x', 'W', '9847', '2015', 'n', '2505', 'y']
answer:

3217xW98472015n2505y