A defence to 1NT (popular in the US). 2♣ shows a hand with one long suit (any suit). 2♦ shows both majors. 2♥/♠ shows the major suit and a long minor suit.
A defence to 1NT (popular in the US). 2♣ shows a hand with one long suit (any suit). 2♦ shows both majors. 2♥/♠ shows the major suit and a long minor suit.