Problema preg_match_all

Salut, am o problema cu urmatorul cod:

Cod PHP:

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$fraza = "raul curge lin pe langa un pin care plange";
$pattern = '/[a-x]{3}ge/';
preg_match_all($pattern, $fraza, $matches);
print_r($matches); 


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Imi returneaza

Cod HTML:

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Array ( [0] => Array ( [0] => curge [1] => lange ) )

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dar eu vreau sa imi ia doar cuvintele care contin "3 litere + ge" insa imi arata si "lange" din "plange".

Cod:

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\s[a-x]{3}ge\s

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