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:
5, 13, ['217', '841', 'G', 'N', '5667', '9343', '8067', '7679', 'T', 'Z', 'G', '6499', 'n']
answer:
n9946GZT9767760834397665


question:
4, 4, ['675', 'e', 'A', 'H', 'O', 'E', 'g', 'j', 'j', '5167', '2367', 'u', 'E', '753', 'M']
answer:
H


question:
3, 12, ['6401', 'N', 'T', '4973', '665', 'z', 'V', 'l', '563', '7437', 'a', '2109', '4135', 'w', '5919', 'r', 'h', '9477', 'N', '3139', '7635', 'D', 'u', 'L', '3779']
answer:

9012a7347365lVz5663794T