C11111211113313112113313331333133313331333132313311211113313221121   >>    C1111121111331311211331333133313331333133313231331121111331322112   <<    C11111211113313112113313331333133313331333132313311211113313221123   >>      C11111211113313112113313331333133313331333132313311211113313221122   >>