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, 3, ['2661', 'T', '8855', 'I', 'f', 'P']
answer:
5588T


question:
4, 12, ['I', 'G', 'u', 'S', '9615', 't', 'p', 'P', 'R', 'v', '8819', '5379', 'I', '1165', '4545', '3117', '1577', 'y', 'W', 'R', 'O']
answer:
97359188vRPpt5169S


question:
16, 17, ['a', 'X', 'L', '4021', 'g', '7771', '8083', '5667', '5139', 'f', 'I', 'k', 'Q', '7629', '927', '5629', '1535', 'I', 'a', 'B', 'H', '8803', 'C', '8609']
answer:

53519265