Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Charles bought 20 papers to draw. Today Charles drew 6 pictures. Yesterday he drew 6 pictures before going to work and some pictures when he came back. How many pictures did Charles draw when he came back from work knowing that he has 2 papers left?

### Response:
 Charles alichora picha 6 + 6 = <<6+6=12>>12.
Ana karatasi 20 – 12 = <<20-12=8>>8 zilizobaki.
Hivyo Charles alichora picha 6 aliporudi kazini.