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:
11, 15, ['807', '2753', 'L', '8633', '7203', 'j', 'a', 'r', 'R', 'q', 'g', 'B', 't', '1373', '3371', 'S', '9977', 'y']
answer:
17333731tBg


question:
7, 8, ['9589', 'N', 'w', '429', '5545', '5047', '4133', 'p', 'a', '3793']
answer:
p3314


question:
1, 4, ['m', 'r', '5933', '1047', '3649', '4191', 'D', 'A']
answer:

74013395rm