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:
1, 2, ['3877', '2107']
answer:
38772107


question:
4, 6, ['k', 'b', 't', '5167', '3621', 'V', '3487']
answer:
51673621V


question:
8, 17, ['2113', 'B', 'Y', 'i', '1123', 'H', '8593', 'y', 'b', '2319', '5525', 's', 'b', '2331', '1405', 'R', '2979', '3577', '2713', '9015', 'y', '7201', '8713', '1647', '9443', 's']
answer:

yb23195525sb23311405R2979