C1111133313331323223313331333133313331333131211113313331211111211113311231221   >>    C111113331333132322331333133313331333133313121111331333121111121111331123122   <<    C1111133313331323223313331333133313331333131211113313331211111211113311231223   >>      C1111133313331323223313331333133313331333131211113313331211111211113311231222   >>