C11111211113313112113313331333133313221333133313113313331322331322321113232321   >>    C1111121111331311211331333133313331322133313331311331333132233132232111323232   <<    C11111211113313112113313331333133313221333133313113313331322331322321113232323   >>      C11111211113313112113313331333133313221333133313113313331322331322321113232322   >>