7 digits
9 digits
Steps to delete 12 digits at the beginning and 4 digits at the end:
1. Read the "Enter setup" barcode;
2. Read "Delete Beginning Characters";
3. Read "1 digit";
4. Read "2 digits";
5. Read "Delete Ending Characters";
6. Read "4 digits";
7. Read the "Exit with save" barcode.
Enter setup
Exit without save
66
8 digits
Exit with save