C1111233131211111211113313331333133313221211113313331333133313113313123222321   >>    C111123313121111121111331333133313331322121111331333133313331311331312322232   <<    C1111233131211111211113313331333133313221211113313331333133313113313123222323   >>      C1111233131211111211113313331333133313221211113313331333133313113313123222322   >>