C11111211113313112113313331333133313331333132313311211113313232212231   >>    C1111121111331311211331333133313331333133313231331121111331323221223   <<    C11111211113313112113313331333133313331333132313311211113313232212233   >>      C11111211113313112113313331333133313331333132313311211113313232212232   >>