what are the nhl rivalries?
['Calgary Flames vs.', 'Colorado Avalanche vs. ... ', 'Philadelphia Flyers vs. ... ', 'New York Rangers vs. ... ', 'Edmonton Oilers vs. Los Angeles Kings. ... ', 'Ottawa Senators vs. Toronto Maple Leafs. ... ', 'Chicago Blackhawks vs. Vancouver Canucks. ... ', 'Montreal Canadiens vs. Quebec Nordiques. ... ']