List<String> results = converter.convert("ティ", null);
        assertTrue(results.contains("ti"));
        assertTrue(results.contains("thi"));
    }

    public void test_convertModernKatakana_Di() {
        List<String> results = converter.convert("ディ", null);
        assertTrue(results.contains("di"));
        assertTrue(results.contains("dhi"));
    }