The table below shows the number of books read by five children in one month.
| Name | Number of books |
|---|
| Kirill | ? |
| Klaudia | 18 |
| Paulina | 12 |
| Nastya | 10 |
| Mark | 15 |
If Kirill read 6 books more than
of the total number of books read by the other four children, then how many books did Kirill read in a month?