#include<stdio.h>
int main()
{
    int x,a,b,c,d,e;
    scanf("%d",&x);
    a=x/10000;
    b=x/1000%10;
    c=x/100%10;
    d=x/10%10;
    e=x%10;
    if(a==5||b==5||c==5||d==5||e==5)
        printf("%d",a+b+c+d+e);
    else
        printf("%d",x);
        return 0;
}

/**************************************************************
	Problem: 1659
	User: admin
	Language: C
	Result: Accepted
	Time:14 ms
	Memory:1144 kb
****************************************************************/