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:
3, 6, ['3315', 't', 'B', 'K', '631', 'e', '3715', 'o', '2761', 'e', 'a', 'K', 'J', '6837']
answer:
BK631e


question:
1, 3, ['3025', 'f', '3847', '3837', 'x', '2207', '2347', '1087', 'd', '2179', '9661', 'O', 'c', 'b', 'S', 'Q', '223', '6749', 'p', 'M', 'E', 't']
answer:
3025f3847


question:
3, 4, ['5091', '6491', 'f', '4989']
answer:

f4989