Parse error: syntax error, unexpected TVAL_ID, expecting TVAL_STRING

I have just begun shader writing , and this was my first shader in unity but the following error is coming

Parse error: syntax error, unexpected TVAL_ID, expecting TVAL_STRING

My Source Code

 shader holistic/helloshader{
     Properties {
         _myColour ("Example Colour", Colour) = (1,1,1,1)
     }
     SubShader {
         CGPROGRAM
         #pragma surface surf Lambert 
         struct Input {
             float2 uvMainTex ; 
         };
         fixed4 _myColour; 
         void surf(Input IN, inout SurfaceOutput o){
             o.Albedo = _myColour.rgb ;
         }
         ENDCG
     }
     Fallback "Diffuse"
 }