C11111211113313112113313331333133313331333132313331333132313331323132212121   >>    C1111121111331311211331333133313331333133313231333133313231333132313221212   <<    C11111211113313112113313331333133313331333132313331333132313331323132212123   >>      C11111211113313112113313331333133313331333132313331333132313331323132212122   >>