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:
1, 6, ['H', '103', '7091', 'V', 'T', 'F']
answer:
FTV1907301H


question:
3, 3, ['8097', '3167', '809']
answer:
908


question:
1, 2, ['L', 'C']
answer:

CL