C1111233131211111211113313331333133313331333133322331311331313321   >>    C111123313121111121111331333133313331333133313332233131133131332   <<    C1111233131211111211113313331333133313331333133322331311331313323   >>      C1111233131211111211113313331333133313331333133322331311331313322   >>