Uncontested auction
1♣ is either clubs (open 1D with 4-4 in the minors) or balanced without four diamonds.
1NT = 12-14
2♦ = game forcing enquiry
2♥ = 4 hearts
4♣ = club singleton
You don't officially play 'last train' but in practice you do in this auction.
Do you agree with 4♣?
Are you worth another move?

Help

1♣ 1♠
1NT 2♦
2♥ 4♣
4♥ ?