C1111233131211111211113313331333133313331312331333132233112313331   >>    C111123313121111121111331333133313331333131233133313223311231333   <<    C1111233131211111211113313331333133313331312331333132233112313333   >>      C1111233131211111211113313331333133313331312331333132233112313332   >>