\[\frac{2}{9} < \frac{c}{18} < \frac{5}{6}\text{\ \ \ }\]
\[\frac{4}{18} < \frac{c}{18} < \frac{15}{18}\text{\ \ }\]
\[\Rightarrow c = 5,\ 6,\ 7,\ 8,\ 9,\ 10,\ 11,\ 12,\ 13,\ \]
\[14.\]