Calling the Twenty: Puzzle M12

CTT-M12 Puzzle

The Forehand, P1, opened with Valat and everyone passed; you are P2, and play has not started. Your hand: XXI, Khearts, Qhearts, Kdiamonds, Cdiamonds, Jdiamonds, Kspades, Qspades, Jclubs, 1hearts.

P3Defender
10 cards

Pass

P1Forehand, Declarer
10 cards

Valat

P4Defender
10 cards

Pass

Your hand

Tarok XXIKing of HeartsQueen of HeartsKing of DiamondsCavalier of DiamondsJack of DiamondsKing of SpadesQueen of SpadesJack of ClubsOne of Hearts

Do you say Kontra? You kontra only an item you can be sure must fail.