```csv
NATIVE_NHS_NUMBER,PROVIDER_NHS_NUMBER
patient1,9476719915
patient2,9476719931
patient3,9476719974
patient4,9476719958
patient5,9476719966
patient6,9476719923
patient7,9476718870
patient8,9476718889
patient9,9476718897
patient10,9476718900
patient11,9476718919
patient12,9476718927
patient13,9476718935
patient14,9476718943
patient15,9476718951
patient16,9000000182
patient17,9000000173
patient18,9000000181
patientNotInSystem,9999999999
patientNoAppointments,9866105660```

Fix patients with invalid nhs numbers
user
```csv
NATIVE_NHS_NUMBER,PROVIDER_NHS_NUMBER
patient1,9476719915
patient2,9476719931
patient3,9476719974
patient4,9476719958
patient5,9476719966
patient6,9476719923
patient7,9476718870
patient8,9476718889
patient9,9476718897
patient10,9476718900
patient11,9476718919
patient12,9476718927
patient13,9476718935
patient14,9476718943
patient15,9476718951
patient16,9630349027
patient17,9226868522
patient18,9973179641
patientNotInSystem,9999999999
patientNoAppointments,9866105660```
assistant