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:
12, 12, ['c', 'a', 'G', 't', '753', 'x', 'I', '4479', 'i', 'y', 'J', 'w']
answer:
w


question:
3, 3, ['5819', '3317', '451', '5811']
answer:
154


question:
8, 12, ['O', 'h', 'W', '8517', '9003', '1183', 'Y', 'S', 'Y', 't', '3293', '2797', '6377']
answer:

79723923tYS