Create error4.txt
Create error2.txt
Rename error2.txt to error3.txt
Create error5.txt
Create error11.txt
Create error20.txt

Tried to create 16 and got this error instead.
Create error18.txt
Create error16.txt
Create error22.txt
Create error23.txt
Create scanner_error1.txt
Create scanner_error2.txt
Create scanner_error3.txt
Create scanner_error4.txt