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:
11, 18, ['7155', 'W', '8393', 'q', 'E', 'S', 'B', '949', '4761', '8663', 'V', 'V', '5047', '4111', '3235', 'I', '1289', 'P', 'O', 'w', '8307', '6725', 'h', '735', 'j', 'x', '1061']
answer:
P9821I532311147405VV


question:
6, 8, ['J', '4955', '3497', '8869', 'n', '2093', '6249', 'A', '8957']
answer:
A94263902


question:
21, 22, ['g', '4259', '1723', 'h', 'P', '2915', '3857', '4529', 's', 'O', '6627', '7385', 'B', 'E', 'K', '3463', '3893', '605', 'K', '9709', 'H', '8453', '2487', 'M', 'w', '4431', 'f', 'N', 'Y', 'c']
answer:

3548H