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, 3, ['8493', '5311', 'Z', 'Q', 'y', '5777', '539', '157', '231', 'I', '9957', '8923', '8491', '1935', '6435', '4087', '2479', 'n']
answer:
5311Z


question:
10, 11, ['7999', 'F', '7363', 'E', 'j', '825', 'i', 's', '5691', '1837', '6625']
answer:
18376625


question:
3, 12, ['4579', 'x', 'Z', '9817', 'X', 'z', 'j', 'v', 'R', 'Y', '6731', 'w', 'm', 'E', '6345', 'n', 'u', '9873', '6337', '9571', '4081', '9941']
answer:

Z9817XzjvRY6731w