def test_four(): data = [float(i) for i in open('input4.txt', 'r').read().split()] assert analyze(data) == "No trades possible"
def test_two(): data = [float(i) for i in open('input2.txt', 'r').read().split()] assert analyze(data) == "8.03 9.34"
def test_one(): data = [float(i) for i in open('input1.txt', 'r').read().split()] assert analyze(data) == "18.88 19.03"