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

/**************************************************************
	Problem: 1659
	User: zhengzihao3
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/