Guess the name of an idol group by looking at the initial consonants only

8) Guess the idol group name just by looking at the initial consonants🌈

1. ㅇㄷㅇ ㅅㄴ

2. Rbrlj

3. ㅇㅇㅇㅇㅇ

4. ㅅㅋㄹ ㄴㅂ