C11111211113313112113313331333133313221333133313113313231322322231   >>    C1111121111331311211331333133313331322133313331311331323132232223   <<    C11111211113313112113313331333133313221333133313113313231322322233   >>      C11111211113313112113313331333133313221333133313113313231322322232   >>