#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a,b,c,d,e;
	cin>>n;
	a=n%10;
	b=n/10%10;
	c=n/100%10;
	d=n/1000%10;
	e=n/10000;
	if (a==5 or b==5 or c==5 or d==5 or e==5){
		cout<<a+b+c+d+e;
	}else{
		cout<<n;
	}
	
		
	
	
		
	return 0;
}

/**************************************************************
	Problem: 1659
	User: lvrenxiang
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/