Lulls can be periodic.Logical formLearned from13 sentences. Demands can be periodic.Logical formLearned from13 sentences. Stories can be periodic.Logical formLearned from13 sentences. (Retention elections) can be periodic.Logical formLearned from13 sentences. A poll can be periodic.Logical formLearned from13 sentences. Disappointments can be periodic.Logical formLearned from13 sentences. A periodic table can be in chemistry.Logical formLearned from13 sentences. A harassment can be periodic.Logical formLearned from13 sentences. An opening can be periodic.Logical formLearned from13 sentences. A self-assessment can be periodic.Logical formLearned from13 sentences. Exhibits can be periodic.Logical formLearned from13 sentences. A density can be periodic.Logical formLearned from13 sentences. Questionnaires can be periodic.Logical formLearned from13 sentences. A conflict can be periodic.Logical formLearned from13 sentences. An observation can be periodic.Logical formLearned from13 sentences.