0, "New York" => 648, "Tokyo" => 6476, "London" => 4000 ); $ny = array ( "Indianapolis" => 648, "New York" => 0, "Tokyo" => 6760, "London" => 3470 ); $tokyo = array ( "Indianapolis" => 6476, "New York" => 6760, "Tokyo" => 0, "London" => 5956 ); $london = array ( "Indianapolis" => 4000, "New York" => 3470, "Tokyo" => 5956, "London" => 0 ); // set up master array $distance = array ( "Indianapolis" => $indy, "New York" => $ny, "Tokyo" => $tokyo, "London" => $london ); $result = $distance[$cityA][$cityB]; print <<The distance between $cityA and $cityB is $result miles.

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