C11111211113313112113313331333133313331333132313311211113313331333133311212321   >>    C1111121111331311211331333133313331333133313231331121111331333133313331121232   <<    C11111211113313112113313331333133313331333132313311211113313331333133311212323   >>      C11111211113313112113313331333133313331333132313311211113313331333133311212322   >>