C1111233131211111211113313331323133313231333133311233132233112321   >>    C111123313121111121111331333132313331323133313331123313223311232   <<    C1111233131211111211113313331323133313231333133311233132233112323   >>      C1111233131211111211113313331323133313231333133311233132233112322   >>