#include<stdio.h>
#include<string.h>
int main(){
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	char s[1048577];
	int nrc=0,k=0,nrcuv=0,i=0;
	while(scanf("%c",&s[i])!=EOF){
		if(s[i]>='a' && s[i]<='z' || s[i]>='A' && s[i]<='Z'){
			nrc++;
			if(k==0)
				nrcuv++;
			k=1;
		}
		else
			k=0;
		i++;
	}
	//printf("%d %d\n",nrc,nrcuv);
	printf("%d",nrc/nrcuv);
	return 0;
}