#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,d,e,f;
	cin>>a;
	b=a%10;
	c=a/10%10;
	d=a/100%10;
	e=a/1000%10;
	f=a/10000%10;
	if(b==5||c==5||d==5||e==5||f==5){
		cout<<b+c+d+e+f;
	}else cout<<a;
}
/**************************************************************
	Problem: 1659
	User: toughuatao1
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/