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, 5, ['7791', '8561', 'r', 'e', '7821', '2611', '1', 'P', 'n', '4097', 'z', 'a', '9589', 'M', '8867']
answer:
8561re7821


question:
2, 13, ['3969', 'F', '8021', 'S', '2059', '2765', '8545', '1039', 'Z', 'b', '5551', 'O', '1875', 'M', '9467', '9225', 'j', 'T', '4585']
answer:
F8021S2059276585451039Zb5551O1875


question:
3, 14, ['f', '2105', '8129', '6957', 'T', 'g', '7157', 'M', '9351', 'n', 'A', 'C', '5489', '4803', 'f', '7527', 'S', '8679', 'a', 'l', '5113']
answer:

81296957Tg7157M9351nAC54894803