C11112331312111112111133133313331333132112312111111331323132313232211   >>    C1111233131211111211113313331333133313211231211111133132313231323221   <<    C11112331312111112111133133313331333132112312111111331323132313232213   >>      C11112331312111112111133133313331333132112312111111331323132313232212   >>