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:
3, 5, ['l', '7281', 'I', '9805', '9063', 'T', 'f', 'k', 'X', 'D', 'j', '9739']
answer:
36095089I


question:
3, 7, ['P', 'P', 'H', 'r', '3563', 'n', 'M', '1577', '6453']
answer:
Mn3653rH


question:
1, 19, ['w', '5475', '5443', '9781', 'X', 'Y', 'C', 'a', 'm', 'Q', '2935', '7967', '3229', '9583', '9077', 'c', 'Y', 'a', 'Q']
answer:

QaYc77093859922376975392QmaCYX187934455745w