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, 4, ['i', '2353', 'A', 'm', 'K', '3203', '287', 'm', '5713']
answer:
2353Am


question:
4, 9, ['9451', 'm', '1961', '7733', '8541', 'n', 'o', 'F', '6697', '9977']
answer:
77338541noF6697


question:
2, 21, ['5471', '6175', '4853', '6259', '1149', 'v', 'P', '6023', 'N', '8081', 'Y', 'p', '2285', '5015', 't', '3539', 'w', '8433', 'j', '2011', 'o', '9361', 'f', 'D', 'w', 'x', '3045', 'T', '2831']
answer:

6175485362591149vP6023N8081Yp22855015t3539w8433j2011o