C11111211113313112113313331333133313331333132313331333133313331322132313223121   >>    C1111121111331311211331333133313331333133313231333133313331333132213231322312   <<    C11111211113313112113313331333133313331333132313331333133313331322132313223123   >>      C11111211113313112113313331333133313331333132313331333133313331322132313223122   >>