C11111211113313112113313331333133313331333132212111133133313331333132233322121   >>    C1111121111331311211331333133313331333133313221211113313331333133313223332212   <<    C11111211113313112113313331333133313331333132212111133133313331333132233322123   >>      C11111211113313112113313331333133313331333132212111133133313331333132233322122   >>