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:
8, 15, ['l', 'p', '7691', 'q', '5663', '41', 'P', '2779', '7265', 'V', '4931', '8979', 'l', 'l', 'l', '45', '1245', 'F', '1139', '3531', '5337', '369', 'g', 'Q']
answer:
lll97981394V56279772


question:
4, 5, ['B', 'H', 'y', 'y', 'K']
answer:
Ky


question:
5, 20, ['8937', '6993', 'V', '321', '27', 'M', '2009', '6783', 'L', '3447', '197', 'f', '2083', 'q', 'u', '3243', '9659', '985', '9105', 'm', 'K']
answer:

m501958995693423uq3802f7917443L38769002M72