The hidden numbers in the new #GIRLSET teaser mean: “SOMETHING IS COMING FIRST”
The code just swaps letters for their place in the alphabet (1=A, 2=B, 3=C). There is a tiny typo in the teaser's numbers that technically spells COMIULY, but it is definitely meant to say COMING.
If you play the #GIRLSET teaser video in reverse, someone says, “Would you miss me?”
Some speculate this could be a snippet of the song’s lyrics or even the title of the track itself.