C1111133313331323223313331333133313331333131211113313331323133313231322123121   >>    C111113331333132322331333133313331333133313121111331333132313331323132212312   <<    C1111133313331323223313331333133313331333131211113313331323133313231322123123   >>      C1111133313331323223313331333133313331333131211113313331323133313231322123122   >>