\shipout\hbox{\smash{\hbox{\hbox{% line 10 a11.mp
training error}\vrule width1sp}}}
\shipout\hbox{\smash{\hbox{\hbox{% line 11 a11.mp
$\frac{\hbox{complexity}}{\hbox{traning set size}}$}\vrule width1sp}}}
\shipout\hbox{\smash{\hbox{\hbox{% line 12 a11.mp
$0$}\vrule width1sp}}}
\shipout\hbox{\smash{\hbox{\hbox{% line 13 a11.mp
$1$}\vrule width1sp}}}
\shipout\hbox{\smash{\hbox{\hbox{% line 14 a11.mp
$0$}\vrule width1sp}}}
\shipout\hbox{\smash{\hbox{\hbox{% line 15 a11.mp
$1$}\vrule width1sp}}}
\end{document}