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, ['L', 'i', '6339', 'p', 'R', '7303', 'R', 'k', '7851']
answer:
Li6339p


question:
5, 5, ['7173', 'b', '9573', 'O', '8047', 'f']
answer:
8047


question:
18, 19, ['5091', '7347', '5079', 'K', 'D', 'c', 'S', '8585', '1697', 't', '6371', '1631', '5419', '7091', '6743', 'n', 'h', 'U', 'F', 'A', '973']
answer:

UF