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, 2, ['q', 'w', 'D', 'A', '3751', 'G', '2419', 'V']
answer:
w


question:
1, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']
answer:
RJ9069R73221503P3353198c9647v794


question:
4, 18, ['T', '5455', '1325', 'k', 'A', '9013', 'o', 'J', '2949', 'A', 'S', '3435', 'i', '1867', '2583', 'o', '5475', 'c', '529', 'b']
answer:

c5745o38527681i5343SA9492Jo3109Ak