C1111233131211111211113313331333133313311211111333133313331323133313231321   >>    C111123313121111121111331333133313331331121111133313331333132313331323132   <<    C1111233131211111211113313331333133313311211111333133313331323133313231323   >>      C1111233131211111211113313331333133313311211111333133313331323133313231322   >>