C11111211113313112113313331333133313331333131211111211113313331321123132233121   >>    C1111121111331311211331333133313331333133313121111121111331333132112313223312   <<    C11111211113313112113313331333133313331333131211111211113313331321123132233123   >>      C11111211113313112113313331333133313331333131211111211113313331321123132233122   >>