def extract_arguments(fh):
    datasets = []
    while True:
        first_line = list(map(int, fh.readline().strip().split()))
        if first_line == [0, 0, 0, 0, 0]:
            break
        n, m, s, g1, g2 = first_line
        roads = []
        for _ in range(m):
            b1, b2, c = map(int, fh.readline().strip().split())
            roads.append((b1, b2, c))
        datasets.append((n, m, s, g1, g2, roads))
    return datasets

# if __name__ == "__main__":
#     input_path = sys.argv[1]
#     with open(input_path, 'r') as fh: 
#         inputs = extract_arguments(fh)
#         f(inputs)