(Transport workers) may cause havoc on rails.Logical formLearned from4 sentences. A storm may wreak havoc on electricity.Logical formLearned from4 sentences. A havoc may wreak by political extremists.Logical formLearned from4 sentences. A male may discuss a havoc.Logical formLearned from4 sentences. A (poverty trap) may wreak havoc on a (support system).Logical formLearned from4 sentences. A weather may play havoc with (team plans).Logical formLearned from4 sentences. A war may wreak havoc on the global economy.Logical formLearned from4 sentences. Militias may create havoc.Logical formLearned from4 sentences. A havoc may pertain-to a weekday.Logical formLearned from4 sentences. A drought may wreak havoc.Logical formLearned from4 sentences. Lack of snow may cause havoc to a program.Logical formLearned from4 sentences. Strike may cause havoc.Logical formLearned from4 sentences. A fighting may wreak havoc.Logical formLearned from4 sentences. Tropical storm may wreaks havoc.Logical formLearned from4 sentences. A (death toll) can be from some days of havoc.Logical formLearned from4 sentences.