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:
4, 4, ['Z', '7465', 'J', 'W']
answer:
W


question:
1, 1, ['f', 'E', 'G', '9657']
answer:
f


question:
2, 27, ['3377', 'R', '6319', 'o', 'e', '9827', 'o', '545', '6853', 'A', '2897', 'K', '9', 'd', '5139', 'Y', 'N', 'u', 't', '9893', '6853', 'm', '1779', '7365', '6415', '7043', '1481', '1713', 'g']
answer:

18413407514656379771m35863989tuNY9315d9K7982A3586545o7289eo9136R