C1111233131211111211113313331333133313221211113313331311331333133313231321   >>    C111123313121111121111331333133313331322121111331333131133133313331323132   <<    C1111233131211111211113313331333133313221211113313331311331333133313231323   >>      C1111233131211111211113313331333133313221211113313331311331333133313231322   >>