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:
10, 10, ['9399', 'p', 'p', 'z', 'E', '4885', 'D', '9037', 'p', '7147', '1835']
answer:
7147


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:
3, 12, ['2635', '4927', '6629', 'g', '1519', '5273', '5639', 'x', 'n', '7293', '3725', 'j', '7553', '2829', 'm', '4097', 'Y', '2411', 'I', '9457', 'o']
answer:

6629g151952735639xn72933725j