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, 8, ['b', 'y', '8779', '3949', 'c', 'a', '111', '6649']

Answer: 9466111ac94939778


Question: 2, 2, ['z', '3345', 'l', '2657', 'J', '4313', 'K', '5307', '9087']

Answer: 5433


Question: 3, 15, ['4765', 'u', 'I', 'E', 'T', 'F', '8477', '6221', 'y', '2379', '6131', 'A', '1331', '7529', 'Z', 'b']

Answer:
Z92571331A13169732y12267748FTEI