#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,s,k,m,n,b,f;
	cin>>a;
	s=a%10;
	k=a/10%10;
	m=a/100%10;
	n=a/1000%10;
	b=a/10000;
	if(s==5||k==5||m==5||n==5||b==5){
		f=s+k+m+n+b;
	}else{
		f=a;
	}cout<<f;
}

/**************************************************************
	Problem: 1659
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/