C1111133313331323223313331333133313113313223313113313113313113313221232123121   >>    C111113331333132322331333133313331311331322331311331311331311331322123212312   <<    C1111133313331323223313331333133313113313223313113313113313113313221232123123   >>      C1111133313331323223313331333133313113313223313113313113313113313221232123122   >>