double maxAmount = -1.0;

    for (Map.Entry<String, Double> entry : fxRates.entrySet()) {
        String[] currencies = entry.getKey().split(",");
        String fromCurrency = currencies[0].trim();
        String toCurrency = currencies[1].trim();
        double rate = entry.getValue();

        if (fromCurrency.equals(originalCurrency)) {
            double amount = rate * calculateMaxAmount(fxRates, toCurrency, targetCurrency);
            if (amount > maxAmount) {
                maxAmount = amount;
            }
        }
    }

    return maxAmount;
}

public static void main(String[] args) throws IOException {
    InputStreamReader reader = new InputStreamReader(System.in, StandardCharsets.UTF_8);
    BufferedReader in = new BufferedReader(reader);

    Map<String, Double> exchangeRates = new HashMap<>();
    exchangeRates.put("USD, CAD", 1.3);
    exchangeRates.put("USD, GBP", 0.71);
    exchangeRates.put("USD, JPY", 109.0);
    exchangeRates.put("GBP, CAD", 155.0);

    String line;
    while ((line = in.readLine()) != null) {
        String[] input = line.split(",");
        if (input.length < 2) {
            continue;
        }
        String originalCurrency = input[0].trim();
        String targetCurrency = input[1].trim();

        double maxTargetAmount = calculateMaxTargetAmount(exchangeRates, originalCurrency, targetCurrency);
        System.out.println(maxTargetAmount);
    }
}