1. Iran raises the price of oil only if Chile complains.
2. Chile complains if Iran raises the price of oil.
3. If Iran and Libya raise the price of oil, then Chile complains if
Brazil protests.
4. Brazil protests only if Iran, but not Libya, raises the price of
oil or Chile doesn't complain.
5. Neither Brazil protests nor Chile complains unless either Iran or
Libya raises the price of oil.
6. Brazil protests if and only if Chile complains and Libya raises
the price of oil or Iran doesn't.
7. Brazil protests unless Chile complains, or Iran but not Libya
raises the price of oil.
8. Brazil protests just in case either Iran raises the price of oil
or Chile complains.
9. Unless Iran raises the price of oil, Brazil protests and Chile complains.
10. Iran raises the price of oil in the event Brazil protests.
11. If Brazil protests and Libya raises the price of oil, then either
Chile complains and Iran doesn't raise the price of oil, or Chile doesn't
complain and Iran raises the price of oil.
12. Neither Libya nor Iran raise the price of oil only if neither Brazil
protests nor Chile complains.