This bidding problem comes from The Bidding Box feature of the ACBL Bridge Bulletin, June 2017 edition. This is where you bid hands with a partner.
We play 2/1, and West's 2NT response shows an invitational hand (10-11, let's say) with no four-card major or perhaps a 4-3-3-3 shape that does include a four card major.
Benefits include:
Plus... it's free!