What printf will return?

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1. #characters
2. #scanf
3. #count
4. #happens
5. #character
6. #inner
7. #return
8. #input
9. #doesn
10. #number
11. #returns
12. #functions
13. #outer
14. #items
15. #actual
16. #returned
17. #prints
18. #printf
19. #output
20. #first
21. #family