sub mk_fuzzy {
  our ($m, $i, $d) = splice @_, 0, 3;
  use re 'eval';
  qr{
    (?{ [ $i, $d, $m ] })
    ^
    @{[ map $_[$_] =~ /!$/ ? substr($_[$_],0,-1) : qq{
      (?:
        $_[$_] (?: | (?(?{ \$^R->[0] }) @{[ $_ < $#_ and "(?! $_[$_+1] )" ]} (?s: . ) (?{ [ \$^R->[0] - 1, \$^R->[1], \$^R->[2] ] }) | (?!) ) )
        | (?(?{ \$^R->[1] }) (?{ [ \$^R->[0], \$^R->[1] - 1, \$^R->[2] ] }) | (?!) )
        | (?(?{ \$^R->[2] }) (?! $_[$_] ) (?s: . ) (?{ [ \$^R->[0], \$^R->[1], \$^R->[2] - 1 ] }) | (?!) )
      )
    }, 0 .. $#_ ]}
    $
    (?{ [ [$m-$^R->[2], $m], [$i-$^R->[0], $i], [$d-$^R->[1], $d] ] })
  }x;
}