#include<iostream>
using namespace std;
int main() {
int a, b, c, d, aux;
cin>>a>>b>>c>>d;
if(a>b){
aux=a;
a=b;
b=aux;
}
if(a>c){
aux=a;
a=c;
c=aux;
}
if(a>d){
aux=a;
a=d;
d=aux;
}
if(b>c){
aux=b;
b=c;
c=aux;
}
if(b>d){
aux=b;
b=d;
d=aux;
}
if(c>d){
aux=c;
c=d;
d=aux;
}
return 0;
}