C11112331333132311331333132313331333133313233121111331333132313331333131121311   >>    C1111233133313231133133313231333133313331323312111133133313231333133313112131   <<    C11112331333132311331333132313331333133313233121111331333132313331333131121313   >>      C11112331333132311331333132313331333133313233121111331333132313331333131121312   >>