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, 14, ['8035', 'N', 'R', 'U', '5691', 'j', '5635', 'c', '3641', 'K', '6871', '8663', '7525', '4031', '5395', 'r', '7549', '3023', 'Y', 'V', '1351', '2397']
answer:
1304525736681786K1463c5365j1965URN


question:
5, 14, ['E', 't', '3441', '459', '6559', 'q', 'b', '2583', 'Z', 'X', 'F', 'j', '601', '2137', 'S', '9739', 'c', 'I', 'l', '4443']
answer:
7312106jFXZ3852bq9556


question:
21, 23, ['4541', 'e', '6105', 'i', '4461', 'u', 'E', '13', '7699', '4591', '6081', '4659', 'M', '7225', 'e', 'D', '1235', '7297', 'a', 'C', '3297', '9631', '6143', '3387', '8441']
answer:

341613697923