C11111211113313112113313331333133313331333131211113313331322331311331313112121   >>    C1111121111331311211331333133313331333133313121111331333132233131133131311212   <<    C11111211113313112113313331333133313331333131211113313331322331311331313112123   >>      C11111211113313112113313331333133313331333131211113313331322331311331313112122   >>