C11112331333132311331333133313331333132313311211331322331123311   >>    C1111233133313231133133313331333133313231331121133132233112331   <<    C11112331333132311331333133313331333132313311211331322331123313   >>      C11112331333132311331333133313331333132313311211331322331123312   >>