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:
7, 8, ['U', 't', '8289', '9391', '1751', 'Y', '9319', 'A', 'Q', 'd', 'B', '2521', '2455']
answer:
A9139


question:
2, 2, ['w', '5569', '6229', 'b']
answer:
9655


question:
5, 11, ['9179', '2647', '1563', 'u', '8597', 'S', 'a', '1141', '9971', '6265', '9063', 'B']
answer:

3609562617991411aS7958