C1111233131211111211113313231333133313331323331333131211113313331322331312121   >>    C111123313121111121111331323133313331333132333133313121111331333132233131212   <<    C1111233131211111211113313231333133313331323331333131211113313331322331312123   >>      C1111233131211111211113313231333133313331323331333131211113313331322331312122   >>