C1111233131211111211113313331333133313232321333133313331322331311212121   >>    C111123313121111121111331333133313331323232133313331333132233131121212   <<    C1111233131211111211113313331333133313232321333133313331322331311212123   >>      C1111233131211111211113313331333133313232321333133313331322331311212122   >>