#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,h;
	cin>>a>>b;
	c=b-a;
	h=a;
	if(a>b)cout<<"Error"<<endl;
	else{
	    cout<<h<<endl;
	    for(int i=1;i<=c;i++){
	    h++;
	   	cout<<h<<endl;
	}

	}
return 0; 
}