C1111233131211111211113313331333133313311211111133133313331323132212321   >>    C111123313121111121111331333133313331331121111113313331333132313221232   <<    C1111233131211111211113313331333133313311211111133133313331323132212323   >>      C1111233131211111211113313331333133313311211111133133313331323132212322   >>