11. The Board on Geographic Names has been puzzling out place names since 1890. 12. So trendsetters are left to puzzle out how to sell individuality in mass quantities. 13. In recent years they have puzzled out why in detail. 14. Scientists are still puzzling out how this process is interrupted. 15. He puzzled out the precise molecular structure of many sapogenins. 16. The results so far show that Russia's tangled customs system can be puzzled out . 17. Sethra, Verra, Morrolan, and Aliera puzzle out how the Jenoine acquired so much amorphia. 18. There are John and Paul, huddled together, intimate as brothers, puzzling out a song. 19. Many tried to puzzle out this bland figure as he carried on his crusade. 20. While the city rushes to comply, transit police try to puzzle out the hijackers'plan.
