C1111233131211111211113313331323133313231333133313232233133313332311321   >>    C111123313121111121111331333132313331323133313331323223313331333231132   <<    C1111233131211111211113313331323133313231333133313232233133313332311323   >>      C1111233131211111211113313331323133313231333133313232233133313332311322   >>