C11111211113313112113313331333133313331322133313331323132321231   >>    C1111121111331311211331333133313331333132213331333132313232123   <<    C11111211113313112113313331333133313331322133313331323132321233   >>      C11111211113313112113313331333133313331322133313331323132321232   >>