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, 7, ['T', 'L', 'F', 'W', '9781', 'Y', '4499']
answer:
LFW9781Y4499


question:
10, 18, ['1863', 'R', '1949', '3689', 'w', '1387', '4909', '9037', '7395', 'X', '9247', 'T', 'n', 'B', '6779', 'b', '1799', '6755', 'z', '3861', '3669', 'G', 'V']
answer:
X9247TnB6779b17996755


question:
8, 16, ['w', '6423', '8045', '9341', '7371', 'U', '4589', 'P', '8549', 'l', '6351', 'm', 'R', 'N', '3373', 'Z', 'x']
answer:

P8549l6351mRN3373Z