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, 20, ['v', 'B', '2287', '1923', 'C', '8477', '4115', '803', '6579', 'u', 'x', 'b', 'J', '4007', '3505', 'M', 'g', 'Z', '2887', 'U', 'S', 'Y', 'i']
answer:
B22871923C847741158036579uxbJ40073505MgZ2887U


question:
12, 19, ['p', '8105', 'c', '8759', '813', 'L', '1451', 'E', 'M', 'N', 'n', '633', '2401', 'p', 'B', 'H', 'G', '2577', 'F', '1045', '8929', '9383']
answer:
6332401pBHG2577F


question:
6, 23, ['m', 'c', 'R', '1805', '7597', '4477', 'Z', '205', 'i', '41', 'n', 'R', 'e', 'B', '3791', 'l', '9981', '9683', '5763', '9895', '5497', 'r', '863', '8935']
answer:

4477Z205i41nReB3791l99819683576398955497r863