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:
6, 6, ['6237', '5511', '7211', '1509', '7331', '9547']
answer:
9547


question:
1, 10, ['f', 'C', '5879', '6395', '8353', 's', 'T', 'u', '9245', '6309', 'N', 'F', '259', '993']
answer:
fC587963958353sTu92456309


question:
2, 4, ['K', 'h', '2535', 'x', '7991', 'l', '2157', 'T']
answer:

h2535x