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, 4, ['s', '3965', 'K', '8535', 'c']
answer:
s3965K8535


question:
1, 2, ['D', '5207']
answer:
D5207


question:
1, 5, ['R', 'p', '3913', '1745', 'd', 'q', '3521', '7021', 'A', '4873', 'q', 'w', 'x', 'n', 'X', 'f', 'U', 'e', '7471']
answer:

Rp39131745d