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  1. or download this
    my $word = q{thing};
    $word =~ tr/i/oooo/;
    __END__
    thong
    
  2. or download this
    my $word = q{Perl is a thing I like to do.};
    $word =~ s/i/oooo/;
    __END__
    Perl oooos a thing I like to do.
    
  3. or download this
    $word =~ s/i/oooo/g;
    __END__
    Perl oooos a thoooong I looooke to do.
    
  4. or download this
    my @text = split /o/, $word;
    print join qq{o},@text;
    __END__
    Perl oooos a thoooong I looooke to do.
    
  5. or download this
    my @text = split /o/, $word;
    print join qq{/n},@text;
    ...
    ke t
     d
    .
    
  6. or download this
    my $line = q{Perl is a thing I like to do.};
    print split /i/, $line;
    ...
    __END__
    Perl s a thng I lke to do.
    Perl is a thing I like to do.
    
  7. or download this
    print join q{o}, split /i/, $line;
    print join q{o}, split /(i)/, $line;
    __END__
    Perl os a thong I loke to do.
    Perl oios a thoiong I loioke to do.
    
  8. or download this
    my $line = q{Perl is a thiiing I like to do.};
    print join q{ooo}, split /i{2,}/, $line;
    __END__
    Perl is a thooong I like to do.