Matching Multiple Times

'index.html'      =~ /\.html?/;

'<bob@gmail.com>' =~ /\w+/;

'Up to 50% off'   =~ /\d+/;

'Space 1999'      =~ /\w\d*/;

'hippopotamus'    =~ /p.p/;

'disgruntled'     =~ /g.*/;

'in a tight spot' =~ /\w{3,4}/;