You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Q: Context: Mary is baking a cake. The recipe calls for 11 cups of sugar and 9 cups of flour. She already put in 12 cups of flour and 10 cups of sugar. 

 Question: How many more cups of sugar does she need to add?

A: 1
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Q: Context: At the arcade Dave had won 14 tickets and lost 2 tickets. If he used 10 to buy some toys 

 Question: How many tickets did Dave have left?

A: 2
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Q: Context: Jessica cut some roses from her flower garden to put in her vase. There are now 19 roses in the vase. If there were 3 roses in the vase initially 

 Question: How many roses did she cut?

A:
16
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