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:
6, 14, ['505', 's', '3619', 's', '2871', '6403', 'b', 'M', 'Q', '9645', '9425', 'V', '873', 'l', '2917', 'Q', '9465', 'z', '1513', 'S', 'e', '9733', '7669', 'B']
answer:
l378V52495469QMb3046


question:
11, 22, ['419', '1533', 'E', 'v', 'S', 'W', '3961', '1175', 'W', 'N', 'F', '1771', '2317', 'y', '3733', 'i', 'S', '5335', '349', '9817', 'F', 'O', '7137', 'X', '6001']
answer:
OF71899435335Si3373y71321771F


question:
17, 19, ['o', 'L', '9959', '8683', '4965', '737', '4275', '7987', '8011', 'Y', 'Z', 'U', 'Z', '2733', '6671', '473', '8393', 'B', 'Z', 'p', '9285', '4091', '7323']
answer:

ZB3938