Index Match with several results

I want to show several results with an Index Match formula,

I have this board in A1

And I want to show every number relatives to "Paris in A3 like 1,2,4, 7.

I tried :

={INDEX($A$1:$A$7,MATCH("Paris",$A$A:$B$B;0))}
={INDEX($A$1:$A$7,MATCH("Paris",$A$A:$B$B;0)0)}
={INDEX($A$1:$A$7,MATCH("Paris",$A$A:$B$B);0)}

But it doesn't works and I Don't know why...