#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%10;
	if(a==5||b==5||c==5||d==5||e==5) cout<<a+b+c+d+e;
	else cout<<n;
}
/**************************************************************
	Problem: 1659
	User: linzihang
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/