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, ['6945', 'D', 'a', 's', 'q', 'M']
answer:
6945Das


question:
4, 4, ['x', 'B', 'M', '2375', '9021']
answer:
2375


question:
2, 12, ['f', '113', 'M', '8191', '8329', 'I', 'b', 'K', 'w', 'u', '6465', 'K', 'y', 'Q', 'S', 'Z', '73', '3947', 'Z', '9911', 'x', '1359', 'L', 'a', 'L', 'I', 'I']
answer:

113M81918329IbKwu6465K


