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:
3, 12, ['N', '9659', '2169', '575', '2155', 'c', '2415', '3095', '2891', '8033', '3641', 'T', 'M', '8365', 'T', '343']
answer:
T14633308198259035142c55125759612


question:
5, 7, ['N', 'U', 'L', '1205', '7327', 'b', 'c']
answer:
cb7237


question:
4, 8, ['1213', 'U', 'C', 'S', '7783', 'B', 'D', 't', 'r', '5073', 'u', 'q', '2585', 'H', 'T', '6723', 'U', '5739']
answer:

tDB3877S