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:
6, 9, ['7139', 'Z', '4407', '9791', 'F', '139', '4927', 's', '4721', 'Y']
answer:
1394927s4721


question:
9, 12, ['h', '463', '8827', 'Z', '5631', 'd', 'f', 't', 'e', 'a', 'F', '2539', '8561']
answer:
eaF2539


question:
1, 5, ['Q', '6281', '771', 'H', 'v']
answer:

Q6281771Hv