C1111233131211111211113313331333133313232321333133313331123313113233111   >>    C111123313121111121111331333133313331323232133313331333112331311323311   <<    C1111233131211111211113313331333133313232321333133313331123313113233113   >>      C1111233131211111211113313331333133313232321333133313331123313113233112   >>