C1111233131211111211113313331323133313231333133311233132233112111   >>    C111123313121111121111331333132313331323133313331123313223311211   <<    C1111233131211111211113313331323133313231333133311233132233112113   >>      C1111233131211111211113313331323133313231333133311233132233112112   >>