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:
6, 7, ['w', '9063', 'T', 'v', '4783', '4041', '5303']
answer:
40415303


question:
16, 21, ['u', '1699', '4205', 'g', '9145', 'c', 'X', '9399', 'Y', '7175', 'i', '783', '6749', 'k', 'J', '7297', '8871', 'q', 'o', 'l', 'X', '1255', 'I', '4539', '6929', 'b', 'a', '9521', '5633']
answer:

72978871qolX