C1111233131211111211113313331333133313231333132313331333133313233112111   >>    C111123313121111121111331333133313331323133313231333133313331323311211   <<    C1111233131211111211113313331333133313231333132313331333133313233112113   >>      C1111233131211111211113313331333133313231333132313331333133313233112112   >>