Signs can be periodic.Logical formLearned from5 sentences. A mortar can be periodic.Logical formLearned from5 sentences. A (pest control) can be periodic.Logical formLearned from5 sentences. Cleansings can be periodic.Logical formLearned from5 sentences. A (hearing screening) can be periodic.Logical formLearned from5 sentences. Leaps can be periodic.Logical formLearned from5 sentences. A re-election can be periodic.Logical formLearned from5 sentences. (Air pollution crises) can be periodic.Logical formLearned from5 sentences. Weekends can be periodic.Logical formLearned from5 sentences. Shortfalls can be periodic.Logical formLearned from5 sentences. (Coupon payments) can be periodic.Logical formLearned from5 sentences. (Round-trip graduation flights) can be periodic.Logical formLearned from5 sentences. An outlook can be periodic.Logical formLearned from5 sentences. A fine-tuning can be periodic.Logical formLearned from5 sentences. Squabbles can be periodic.Logical formLearned from5 sentences.