Plan 9 from Bell Labs’s /usr/web/sources/contrib/fgb/root/sys/src/cmd/4th/examples/bf/fib.b
++++++++++>>+>>+ [ [ +++++[<++++++++>-]<. >++++++[<-------->-] +<<< ]<.>>>> [ -<[<+>>+<-] <[>+<-[>+<-[>+<-[>+<-[>+<- [>+<-[>+<-[>+<-[>+<- [>[-]>>+>>[-]+<<<<<- [>+<-]]]]]]]]]]] >>[<<+>>-] +>>> ]<<< ] Daniel B. Cristofani (cristofd@hevanet.com)