C1111233131211111211113313331333133313331333133313331333121111331322123122321   >>    C111123313121111121111331333133313331333133313331333133312111133132212312232   <<    C1111233131211111211113313331333133313331333133313331333121111331322123122323   >>      C1111233131211111211113313331333133313331333133313331333121111331322123122322   >>