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, 2, ['S', '411', '3257', 'c', '3483', 'i', 'h', 't']
answer:
114S


question:
2, 5, ['O', '4183', 'N', '3695', 'U']
answer:

U5963N3814