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


question:
3, 6, ['7269', '329', '3751', 'i', '9639', '8939']
answer:
3751i96398939


question:
5, 5, ['Z', '9409', '4803', '6043', '8171', '9521']
answer:

8171