C11112331333132311331333133313331333132313121111331333131133132322223211312131   >>    C1111233133313231133133313331333133313231312111133133313113313232222321131213   <<    C11112331333132311331333133313331333132313121111331333131133132322223211312133   >>      C11112331333132311331333133313331333132313121111331333131133132322223211312132   >>