C11112331333132311331333133313331323133313223121133132313223311   >>    C1111233133313231133133313331333132313331322312113313231322331   <<    C11112331333132311331333133313331323133313223121133132313223313   >>      C11112331333132311331333133313331323133313223121133132313223312   >>