C1111233131211111211113313331333133313331312211111133133313331322212111   >>    C111123313121111121111331333133313331333131221111113313331333132221211   <<    C1111233131211111211113313331333133313331312211111133133313331322212113   >>      C1111233131211111211113313331333133313331312211111133133313331322212112   >>