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:
2, 5, ['l', 'E', '729', 'U', 'z', '9729', '3247']
answer:
zU927E


question:
1, 2, ['S', 'm', 'j', '6193', '79', '9401', '2469', '7919', '9563', 'l', 'm', 'A', '983', 'M', '6661']
answer:
mS


question:
5, 11, ['Y', 'f', '1849', '3049', '5581', 'r', 'u', 'g', '5949', 'H', 'i', '8705', '875', '697', '2559', '481', '9811', '899']
answer:

iH9495gur1855