Smolen

When holding 5-4 in the majors and game-forcing values, one starts with 2♣, Stayman. If opener rebids a major, then a fit has been found; otherwise:

WestNorthEastSouth  
  1NT Pass 2♣ Do you have a 4-card major?
Pass 2 Pass ? No.

Then responder’s jump to 3 of a major shows 4 cards in the suit bid, 5-cards in the other major and is game-forcing.

3 4 hearts, 5 spades, game force
3♠ 4 spades, 5 hearts, game force