#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<algorithm>

using namespace std;
char us[11],as[11];
int main(){
	FILE *u=fopen("user_out","r");
	FILE *a=fopen("answer","r");
	int ans=100;
	for(int i=1;i<=50;i++){
		fscanf(u,"%s",us),fscanf(a,"%s",as);
		if(strcmp(as,us)!=0){
			ans--;
			fprintf(stderr,"Wrong answer on problem %d.\n",i);
		}
	}
	fscanf(u,"%s",us),fscanf(a,"%s",as);
	if(strcmp(as,us)!=0){
		fprintf(stderr,"Wrong answer on problem 51.Read the help and notices carefully,please.\n");
	}
	printf("%d\n",ans);
	return 0;
}