By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
| str | FourElements |
|---|---|
| a,b,c,d,e,f,g | a,b,c,d |
| f,a,bcd,gd,er,ad,adsadc,...,.,,.,. | f,a,bcd,gd |
| str | FourElements |
|---|---|
| a,b,c,d,e,f,g | a,b,c,d |
| f,a,bcd,gd,er,ad,adsadc,...,.,,.,. | f,a,bcd,gd |