C1111233131211111211113313331333133313331333133313331333133313233313132121   >>    C111123313121111121111331333133313331333133313331333133313331323331313212   <<    C1111233131211111211113313331333133313331333133313331333133313233313132123   >>      C1111233131211111211113313331333133313331333133313331333133313233313132122   >>