def extract_arguments(fh):
    datasets = []
    while True:
        n = int(fh.readline().strip())
        if n == 0:
            break
        s, t, b = fh.readline().strip().split()
        datasets.append((n, s, t, b))
    return datasets

# Example usage:
# if __name__ == "__main__":
#     input_path = sys.argv[1]
#     with open(input_path, 'r') as fh:
#         datasets = extract_arguments(fh)
#         for n, s, t, b in datasets:
#             f(n, s, t, b)