assertTrue(results.contains("kya"));
    }

    public void test_convertSha() {
        List<String> results = converter.convert("シャ", null);
        assertTrue(results.contains("sya"));
        assertTrue(results.contains("sha"));
    }

    public void test_convertCha() {
        List<String> results = converter.convert("チャ", null);
        assertTrue(results.contains("tya"));