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, 3, ['5191', '9077', 'a']

Answer: a7709


Question: 4, 7, ['6083', 'j', 'x', 'K', 'p', 'M', 'u', '4969', '2423', 'w', 'v', 'S', 'Y', 'v', '5165', 'Y', '3127', '79', '9755', 'Y', 'B', '7395', '6093', 'k', '2043', '6807']

Answer: uMpK


Question: 10, 14, ['5577', '2149', 'A', '2673', 'W', '3763', 's', 'E', '6627', 'L', 'f', 'R', 'N', 'D', '8807', 'z', 'J', '8423', 'x', '6599', '5645']

Answer:
DNRfL