Head may undergo a progression.Logical formLearned from2 sentences. An album may show progression.Logical formLearned from2 sentences. Primes can be in an (arithmetic progression).Logical formLearned from2 sentences. A progression can be dark.Logical formLearned from2 sentences. A (chord progression) can be for a song.Logical formLearned from2 sentences. Line can be with a progression.Logical formLearned from2 sentences. (Age progression) can be a theme.Logical formLearned from2 sentences. A progression can be mawkish.Logical formLearned from2 sentences. Progression can be to toxemia.Logical formLearned from2 sentences. Progression can be in a class.Logical formLearned from2 sentences. (Rock music) may undergo a progression.Logical formLearned from2 sentences. (Chord progressions) can be exotic.Logical formLearned from2 sentences. An impact can be on a progression.Logical formLearned from2 sentences. An inner-strength may undergo a progression.Logical formLearned from2 sentences. (Game progression) may be doed in manner.Logical formLearned from2 sentences.