C11112331333132311331333133313331323132313331211113311211313221   >>    C1111233133313231133133313331333132313231333121111331121131322   <<    C11112331333132311331333133313331323132313331211113311211313223   >>      C11112331333132311331333133313331323132313331211113311211313222   >>