C1111233131211111211113313331323133313231323223313331312323133311222121   >>    C111123313121111121111331333132313331323132322331333131232313331122212   <<    C1111233131211111211113313331323133313231323223313331312323133311222123   >>      C1111233131211111211113313331323133313231323223313331312323133311222122   >>