${\tt Rt,W^{t^{t^{t^{t}}}}cl}$

#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
const int Maxn=10010;
string pread[Maxn];
string pwrite[Maxn];
int lines;
int time;
inline int min(int a,int b){return a<b?a:b;}
inline int max(int a,int b){return a>b?a:b;}
inline void qread(int x){
	int f=1;
	char ch=getchar();
	x=0;
	while(ch<'0'||ch>'9'){
		if(ch=='-') f=-1;
		ch=getchar();
	}
	while(ch>='0'&&ch<='9'){
		x=(x<<3)+(x<<1)+(ch&15);
		ch=getchar();
	}
	x*=f;
}
inline void qwrite(int x){
	if(x<0) putchar('-'),x=-x;
	if(x>9) qwrite(x/10);
	putchar(x%10+'0');
}
inline int read(){
	int cntread=0,cntwrite=0;
	string eof="EOF";
	for(int i=0;;i++){
		getline(cin,pread[i]);
		if(pread[i].compare(eof)==0) break;
		cntread++;
	}
	for(int i=0;;i++){
		getline(cin,pwrite[i]);
		if(pwrite[i].compare(eof)==0) break;
		cntwrite++;
	}
	qread(time);
	return min(cntread,cntwrite);
}
inline void clear(){
	int len;
	for(int i=0;;i++){
		len=pwrite[i].size();
		for(int j=0;j<len;j++){
			if(pwrite[i][j]=='<'&&j) pwrite[i][j]=pwrite[i][j-1]='0';
		}
	}
}
inline int cnt(){
	int ans=0;
	int len;
	for(int i=0;i<lines;i++){
		len=min(pread[i].size(),pwrite[i].size());
		for(int j=0;j<len;j++){
			if(pread[i][j]==pwrite[i][j]) ans++;
		}
	}
	return ans;
}
int main(){
	int res;
	lines=read();
	clear();
	res=cnt();
	res=(int)(res*1.0/time+0.5);
	qwrite(res);
	return 0;
}