instruction:
In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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'. Perform the operations in order, i.e., do not reverse first and then concatenate.
question:
9, 9, ['5503', 'f', 'g', 'B', '3003', '229', '4613', 'C', 'j', 'o']
answer:
j


question:
4, 20, ['H', '7451', 'X', 'i', '951', '1913', '9949', 'W', '4759', '1309', '1981', 'C', 'J', 'F', '4125', 'l', 'i', 'z', 'S', 'R', '5025', '5959', '1323', 'K', 'O', 'x', '5121', 'c', 'C']
answer:
RSzil5214FJC189190319574W94993191159i


question:
3, 11, ['5943', 'n', '5307', '8017', '1129', '5825', 'r', 'g', 'A', '1311', 'I', '6133', 'a', 'f', '6289', '4633', 'K', 'k', 'G', 'I', '705', 'y', 'Y', 'W', '3387', 'm']
answer:

I1131Agr5285921171087035