C11111211113313112113313331333132313331322113121111331333131133132233312121   >>    C1111121111331311211331333133313231333132211312111133133313113313223331212   <<    C11111211113313112113313331333132313331322113121111331333131133132233312123   >>      C11111211113313112113313331333132313331322113121111331333131133132233312122   >>