dūdūnóngnóng
ㄉㄨ ㄉㄨ ㄋㄨㄥˊ ㄋㄨㄥˊ
Simplified 嘟嘟哝哝
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 嘟嘟噥噥 and it comes back until you know it.