C11111211113313112113313331333133312111113331333133313311223312121   >>    C1111121111331311211331333133313331211111333133313331331122331212   <<    C11111211113313112113313331333133312111113331333133313311223312123   >>      C11111211113313112113313331333133312111113331333133313311223312122   >>