C111123313331323113313331333133313121111133112121111331323132313232212321   >>    C11112331333132311331333133313331312111113311212111133132313231323221232   <<    C111123313331323113313331333133313121111133112121111331323132313232212323   >>      C111123313331323113313331333133313121111133112121111331323132313232212322   >>