\[10\ :8 = 1\ (ост.\ 2) \rightarrow f(10) = 2\ \ \]
\[17\ :8 = 2\ (ост.\ 1) \rightarrow f(17) = 1\ \ \]
\[27\ :8 = 3\ (ост.\ 3) \rightarrow f(27) = 3\ \]
\[40\ :8 = 5\ (ост.\ 0) \rightarrow \text{\ f}(40) = 0\]