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:
7, 19, ['6151', 'l', 'J', 'E', '9937', 'B', '7501', '6221', 'K', '121', '7373', 'f', '2067', 'l', 'k', '3715', 'X', 'K', '7423']
answer:
75016221K1217373f2067lk3715XK7423


question:
19, 23, ['7749', 'H', 'y', '7905', '8567', '3819', '2839', '9145', '4915', 'M', 'U', '7891', '5601', '7109', 'x', 'z', '295', '8709', 'G', 'L', '1297', 'W', '6037', '2479', 'F', '5493', 'Q']
answer:
GL1297W6037


question:
8, 18, ['B', 'e', '2281', '7757', '2921', '6313', 'S', 'T', 'U', '5587', 'o', '3647', 'U', 'm', '7417', '2519', 'f', 'r', 'M', '1483', 'c']
answer:

TU5587o3647Um74172519fr