C11111211113313112113313331333133313221333133313113313331322331323133313121321   >>    C1111121111331311211331333133313331322133313331311331333132233132313331312132   <<    C11111211113313112113313331333133313221333133313113313331322331323133313121323   >>      C11111211113313112113313331333133313221333133313113313331322331323133313121322   >>