C11111211113313112113313331333131133133313222313331333132233112121   >>    C1111121111331311211331333133313113313331322231333133313223311212   <<    C11111211113313112113313331333131133133313222313331333132233112123   >>      C11111211113313112113313331333131133133313222313331333132233112122   >>