C11111211113313112113313331333133313233313113121111331311331323232211211   >>    C1111121111331311211331333133313331323331311312111133131133132323221121   <<    C11111211113313112113313331333133313233313113121111331311331323232211213   >>      C11111211113313112113313331333133313233313113121111331311331323232211212   >>