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, 5, ['7117', '2053', 'U', '329', 'J', '4161']
answer:
71172053U329J


question:
3, 4, ['o', '9787', '2705', 'u', '2699']
answer:
2705u


question:
1, 4, ['f', 'u', 'r', '9535']
answer:

fur9535