#include <stdio.h>

int main() 
{

    char s[]="124259";

    int ans=0;
    //iterate through all the number
    for(int i=0; s[i] != '\0';i++){
        int ele=s[i]-48;
        if(ele <=9)
            ans+=ele;
    }

    //Print sum of the numbers
    printf("%d",ans);
    
    return 0;
}