Havoc can be in cities.Logical formLearned from3 sentences. (Military action) may wreak havoc.Logical formLearned from3 sentences. Avian flu may wreak havoc on economies.Logical formLearned from3 sentences. Havoc can be in a continent.Logical formLearned from3 sentences. Young persons may wreak havoc.Logical formLearned from3 sentences. Rain may play havoc with (relief efforts).Logical formLearned from3 sentences. Thousands of (earthquake survivors) may play havoc with (relief efforts).Logical formLearned from3 sentences. Shutdowns may play havoc.Logical formLearned from3 sentences. Havoc can be to parts of a us-state.Logical formLearned from3 sentences. Floodwaters may wreak havoc.Logical formLearned from3 sentences. Terrorists may wreak havoc.Logical formLearned from3 sentences. A pace may wreak havoc.Logical formLearned from3 sentences. Aftershocks may play havoc with nerves.Logical formLearned from3 sentences. A yuan may wreak havoc on the economy.Logical formLearned from3 sentences. Havoc can be on shores.Logical formLearned from3 sentences.