A (reporting system) can be periodic.Logical formLearned from8 sentences. (Report deadlines) can be periodic.Logical formLearned from8 sentences. An end may pertain-to a periodic table.Logical formLearned from8 sentences. (Income payments) can be periodic.Logical formLearned from8 sentences. A (boundary value problem) can be periodic.Logical formLearned from8 sentences. A mechanism can be periodic.Logical formLearned from8 sentences. (Death threats) can be periodic.Logical formLearned from8 sentences. Needs can be periodic.Logical formLearned from8 sentences. (Refresh messages) can be periodic.Logical formLearned from8 sentences. Spacings can be periodic.Logical formLearned from8 sentences. A reduction can be periodic.Logical formLearned from8 sentences. (E-mail messages) can be periodic.Logical formLearned from8 sentences. A production can be periodic.Logical formLearned from8 sentences. (Boundary conditions) can be periodic.Logical formLearned from8 sentences. A message can be periodic.Logical formLearned from8 sentences.