C11112331333132311331333133313331333132313121111331312111133133313223313112131   >>    C1111233133313231133133313331333133313231312111133131211113313331322331311213   <<    C11112331333132311331333133313331333132313121111331312111133133313223313112133   >>      C11112331333132311331333133313331333132313121111331312111133133313223313112132   >>