#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,g,s,b,q,w;
    cin>>n;
    g=n%10;
    s=n/10%10;
    b=n/100%10;
    q=n/1000%10;
    w=n/10000;
    if(g==5||s==5||b==5||q==5||w==5){
    	cout<<g+s+b+q+w;
    }else{
    	cout<<n;
    }
}
/**************************************************************
	Problem: 1659
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/