C1111233131211111211113313331333133313331323223313231323133311211   >>    C111123313121111121111331333133313331333132322331323132313331121   <<    C1111233131211111211113313331333133313331323223313231323133311213   >>      C1111233131211111211113313331333133313331323223313231323133311212   >>