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, 5, ['B', 'H', 'y', 'y', 'K']
answer:
Ky


question:
13, 16, ['a', 'y', 'd', 'F', 'P', '8965', 'G', 'V', 'W', 'y', '4275', '7653', '5643', '321', 'u', '721', 'm', '1483', '3321', '3851', '6373', '9445', '1193']
answer:
127u1233465


question:
9, 15, ['s', '9225', '6903', '3857', 'Q', '4515', 'J', '3805', 'm', 'H', '705', '9575', 's', '551', 'f', 'I', 'n', '1097', '7061']
answer:

f155s5759507Hm