C11112331333132311331333133313331333132312323133313231331121211   >>    C1111233133313231133133313331333133313231232313331323133112121   <<    C11112331333132311331333133313331333132312323133313231331121213   >>      C11112331333132311331333133313331333132312323133313231331121212   >>