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:
16, 23, ['8677', '5311', '9815', 'v', 'x', 'q', 'F', '5221', '7309', '5201', '6021', 'w', 'e', 'q', '7021', '8889', '4377', 'w', '2731', '5969', 'J', '1001', '637', 'r', 'b', '409', 'l', '391']
answer:
7361001J96951372w77349888


question:
1, 2, ['3909', '5863', '707']
answer:
36859093


question:
16, 17, ['y', '5181', 'n', '457', '9731', 'I', '6383', '1163', '3531', '665', 'r', '5941', '6259', 'S', '1069', '5757', '2121', '5129', 'Y', 'q', '8913', 't', '2709', '6915']
answer:

12127575