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, ['663', '6503']
answer:
6636503


question:
4, 20, ['1033', '6489', '3569', 'f', '4483', 'm', '8817', '6619', '2881', 'K', '227', '2479', '6185', 'C', '1351', 'D', 'L', '5997', '6921', '7909']
answer:
f4483m881766192881K22724796185C1351DL599769217909


question:
2, 2, ['f', 'A', '4043']
answer:

A