A person may wear a (ski mask).Logical formLearned from4 sentences. A face can be behind a (ski mask).Logical formLearned from4 sentences. Masks may help.Logical formLearned from4 sentences. Some elements can be for projecting a (mask image).Logical formLearned from4 sentences. A (mask layer) can be hard.Logical formLearned from4 sentences. A lack of masks can be a problem.Logical formLearned from4 sentences. A router may determine a mask.Logical formLearned from4 sentences. A (mask length) may equal an (address length).Logical formLearned from4 sentences. A mask may describe an address.Logical formLearned from4 sentences. A mask may undergo a specification.Logical formLearned from4 sentences. Routes can be with a mask.Logical formLearned from4 sentences. A mask may be generated.Logical formLearned from4 sentences. An encapsulation may carry a (bit mask).Logical formLearned from4 sentences. A use of (bit mask) may enable compression.Logical formLearned from4 sentences. Masks can be personalized.Logical formLearned from4 sentences.