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:
1, 4, ['6969', 'P', '8161', '6347', 'P', 'S', 'z']
answer:
74361618P9696


question:
3, 5, ['23', 'a', '3181', '3035', '1915']
answer:

519153031813