It takes time to acquire the skill of quickly recognizing what digits are missing from a constituancy.

DING. It had some pretty hard combos.

Difficulty score 21. No green.

go

done. no greens

go

done, no greens, nice one

hello everybody

done, no greens

commence

terminate... no greenss

go

no green

I did it! Done!

DING. Real easy, but it had some interesting things you rarely see.

go

done ng