C11111211113313112113313331333133313221333133313113313331322211321   >>    C1111121111331311211331333133313331322133313331311331333132221132   <<    C11111211113313112113313331333133313221333133313113313331322211323   >>      C11111211113313112113313331333133313221333133313113313331322211322   >>