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, 6, ['1399', 'd', 'X', '4795', 'H', 'R']
answer:
4795HR


question:
1, 3, ['n', 'Q', '8725', '3893']
answer:
nQ8725


question:
10, 13, ['U', '3305', 'Y', 'g', 'R', 'J', '9605', '8763', 'V', 'w', '4871', '2365', '5449', 'v']
answer:

w487123655449