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, 4, ['5237', 'X', '1691', '5405']
answer:
X16915405


question:
3, 9, ['X', 'M', '2111', 'V', 'K', '4989', 'p', 'e', '9125']
answer:
2111VK4989pe9125


question:
5, 7, ['c', '6617', '8159', 'V', 'P', 'F', '9177', 'B', 'O', '7745', 'K', '261', 'g', 'v', 'w']
answer:

PF9177