C11112331312111112111133133313331323132313232233133313223313233221211   >>    C1111233131211111211113313331333132313231323223313331322331323322121   <<    C11112331312111112111133133313331323132313232233133313223313233221213   >>      C11112331312111112111133133313331323132313232233133313223313233221212   >>