    decode_data.AddString(0, "abcdefghIJ", "abcdefghIJ");   decode_data.AddString(0, "abcdefghIJ", "_AbcdefghIJ");   decode_data.AddString(0, "abcdefghIJ", "Abcd_EfghIJ");   decode_data.AddString(0, "abcdefghIJ", "A