C1111233131211111211113313331333133313331333133313331323133313331312121121   >>    C111123313121111121111331333133313331333133313331333132313331333131212112   <<    C1111233131211111211113313331333133313331333133313331323133313331312121123   >>      C1111233131211111211113313331333133313331333133313331323133313331312121122   >>