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, 12, ['W', '7747', '1915', 'Z', '6841', 'U', '7357', 'B', '5029', 'd', '69', 'E']
answer:
U7357B5029d69E


question:
12, 15, ['x', '2195', 'c', '2471', 'h', 'G', 'o', 'H', '6183', 'w', 'r', 'c', 'F', 'u', '7549', '7451', '8411', '3299']
answer:
cFu7549


question:
6, 9, ['1279', 'J', 'x', '8951', '8465', 'd', '153', '8413', 'e', 'b', 'q', '5635', 'C', 'M', 'E', 'm']
answer:

d1538413e