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:
1, 3, ['o', 'o', '4511', '9203', '6071', 'Q', '5337']
answer:
1154oo


question:
6, 12, ['z', 'E', '6097', 'G', 'Z', 'X', '4155', 'r', 'n', 'i', '4915', 't', 'P', 'A']
answer:
t5194inr5514X


question:
7, 11, ['8971', 'j', '419', 't', '9967', 'e', 'q', 'p', '5813', '1791', 'm', 'L', '4911', '3133', '7943', 'A']
answer:

m19713185pq