1 Introduction
2 Preliminaries
2.1 Stochastic Context-free Grammars
2.2 SCFG-based Joint RNA Compression
3 Stochastic RNA Normal Form for Grammars
4 Methodology and Results
4.1 Exhaustive exploration
4.2 Distribution of compression ability
4.3 Random search
4.4 Comparison with expert-curated grammars
5 Conclusion
References
Appendix
A New Grammars