\documentstyle[pi]{article}
\begin{document}
\large
\def\CBT#1{\CERNBB{#1} \GOTHIC{#1} \BGREEK{#1} \UPGREEK{#1}}
 $ \niceone = \pi \CBT{CHERRY PIE} $

$ \BBB{HELLO IS THIS IN BB} / 
\CERNBB{HELLO IS THIS IN BB} $

\end{document}