C++ :

#include<iostream>
#include<cmath> 
using namespace std;
bool ss(int );
int main()
{
	int n,m,k=0,j=0,l=0;
	cin>>n>>m;
	for(int i=n;i<=m;++i)
	{
		if(ss(i)==0)
		++j;
	}
	for(int i=n;i<=m;++i)
	{
		if(ss(i)==0)
		{
			cout<<i<<" ";
			++l;
	    }
	}
	if(l==0)cout<<"No";
	return 0;
	
}
bool ss(int a)
{
	if(a==1||a==0)return 1;
	else
	{
		int x=2;
	int b=floor(sqrt(a));
	while(x<=b&&(a%x!=0))
	++x;
	if(x>b)return 0;
	else return 1;
	}
}