#include<iostream>
using namespace std;
int main(){
	int a,b;
	cin>>a>>b;
	swap(a,b);
	cout<<a<<" "<<b;
	return 0;
}

#include <iostream>
using namespace std;int main(){int a,b;cin>>a>>b;cout<<b<<" "<<a;return 0;}

#include <iostream> #include <cstdio> using namespace std; int main() { int a,b;//创建变量 cin>>a>>b;//赋值ab值 swap(a,b);//交换ab值 cout<<a<<" "<<b;//输出交换后ab值 return 0; }

#include <iostream> using namespace std; int main() { int a , b , c,d; cin>>a>>b; c=a; a=b; b=c; cout<<a<<" "<<b;

}

#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b;
cin>>a>>b;
swap(a,b);//交换a和b值
cout<<a<<" "<<b;
}

#include <iostream>
using namespace std;
int main()
{
  int a,b,c,d;
  cin>>a>>b;
  c=b;
  d=a;
    printf("%d %d",c,d);
}

#include <bits/stdc++.h>

using namespace std;

int main(void) { int a, b, x;

cin >> a >> b;

cout << b << " " << a;

return 0;

}

#include <stdio.h>
#include <iostream>
using namespace std;
int main()
{
	int a,b;
	cin >> a >> b;
	cout << b << " " << a <<endl;	
}