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:
2, 7, ['5731', 'm', 'W', '5389', 'N', '4987', 'c', '3871', 'T']
answer:
mW5389N4987c


question:
1, 2, ['6729', 'z']
answer:
6729z


question:
14, 21, ['v', '985', '3091', 'A', 'z', '1359', 'a', '9037', '2429', '8489', '3205', 'I', '4083', '2989', '5201', '7577', '9433', '9837', 'p', '5571', 'I', 'g']
answer:

29895201757794339837p5571I