If $\sqrt { 18+\sqrt { 308 } } +\sqrt { 15+\sqrt { 104 } } =e\sqrt { a } +f\sqrt { b } +g\sqrt { c } +h\sqrt { d } \\$ ,where $a,b,c,d,e,f,g,h$ are positive integers.Then find the value of $a+b+c+d$.

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