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, 3, ['4101', '9767', 'q', 'Z', '6853', '3643']
answer:
q76791014


question:
1, 3, ['6017', 'o', '1817', 'W']
answer:
7181o7106


question:
2, 11, ['9911', '3837', 'y', '1169', '1749', '4803', '2417', 'a', '6639', '6123', 'X']
answer:

X32169366a7142308494719611y7383