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: Randy uses 36 blocks to build a tower. If he had 59 blocks 

 Question: How many blocks are left?

A: 23
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Q: Context: Dave had 16 apps and 77 files on his phone. After deleting some apps and files he had 5 apps and 23 files left. 

 Question: How many apps did he delete?

A: 11
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Q: Context: Jerry had 5 action figures and 2 books on a shelf in his room. Later he added 9 more books to the shelf. 

 Question: How many more books than action figures were on his shelf?

A:
6
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