Basic 1NT : Deal 1
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Dealer is W     None Vulnerable
West *
K Q 8 5
A 9
K J 10 3
A 9 4
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East
A 9
K Q 8 7 5 4
Q 6 2
8 3
 
W N E S
1NT - 4♥ -
Pass -    
       
 
Opener is balanced and must therefore have at least 2 hearts.
Therefore : 6 + 2 = 8 cards in hearts > a trump fit.