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:
5, 6, ['U', 'E', 'k', '7897', 'R', '2025', '6683', 'a', 'U', '7765', '2065', '6065', 'Q']
answer:
R2025


question:
2, 10, ['8615', '4155', 'k', '1061', '6223', 'V', '379', '4369', 'n', 'U', 'u', '5007', 'q', 'f']
answer:
4155k10616223V3794369nU


question:
10, 18, ['4619', 'W', '6615', 'C', 'U', 'i', 's', '8197', '2365', '7475', '47', 'S', '7197', '8603', '9841', '7251', 'N', '8261']
answer:

747547S7197860398417251N8261