#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,s,d,f;
	cin>>a>>s>>d>>f;
	if(a<s){
		swap(a,s);
	}
	if(a<d){
		swap(a,d);
	}
	if(a<f){
		swap(a,f);
	}
	if(s>d){
		swap(d,s);
	}
	if(s>f){
		swap(f,s);
	}
	if(f>d){
		swap(d,f);
	}cout<<a<<" "<<d<<" "<<f<<" "<<s;
}

/**************************************************************
	Problem: 1705
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/