C11112331333132311331333132313331333133313233111211113321123221   >>    C1111233133313231133133313231333133313331323311121111332112322   <<    C11112331333132311331333132313331333133313233111211113321123223   >>      C11112331333132311331333132313331333133313233111211113321123222   >>