#include <stdio.h>
#include <stdlib.h>

int funkcija(int* niz,int duzina){

         int a,i,b,c,br1,br2,br3=0;
         for(i=0; i<duzina; i++){
              a=niz[i];
              br1=0;
              br2=0;
              while(a!=0){

                b=a%10;
                a=a/10;
                c=a%10;
                if(b==c){br1++;}
                br2++;
              }
            if(br1==(br2-1))
                br3++;
         }
         return br3;

}

int main()
{  int i=0,niz[100];

   FILE* ulaz;
   FILE* izlaz;
   ulaz=fopen("m.txt","r");
   if(ulaz==NULL){exit(1);}
   while(fscanf(ulaz,"%d,",niz[i])!=EOF){
    i++;
   }
   izlaz=fopen("s.txt","w");
   fprintf(izlaz,"%d",funkcija(niz,i));
   fclose(ulaz);
   fclose(izlaz);
   return 0;



}