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:
3, 4, ['4887', 'N', 'y', '2813', 'C', 'J', 'v', '3199']
answer:
3182y


question:
3, 12, ['2159', 'f', 'u', '2675', '7357', '9325', '1275', '8897', 'I', '2095', '5835', '577', 'g', '2783', '7843', '8517', '4185', '5847', '2645', '2357', 'l', 'v', '2239', '141', 'o', '2529', '7977', '8445', '2363']
answer:
77553855902I79885721523975375762u


question:
12, 16, ['D', '4531', '9235', 'G', 'Z', 'l', 'K', '3089', '669', 'R', '8631', 'v', 'l', '4767', 'v', '4455', 'a', '2225', 'u', 'J', 'y', 'd', '5195']
answer:

5544v7674lv