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, 9, ['K', 'B', 't', '8137', '7741', '169', '7603', 'A', '3315', 'E', 'T', 'S', '7873', 'L']
answer:
Bt813777411697603A3315


question:
2, 5, ['3823', 'P', '9615', '6979', '5511', '7483', '4315', '6363', 'u']
answer:
P961569795511


question:
4, 4, ['V', '8793', 'j', 'N']
answer:

N