#include<stdio.h>
#include<string.h>
int main(){
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	char s[1048577];
	int nrc=0,nrs=0,nrg=0,i;
	gets(s);
	nrc=strlen(s);
	for(i=0;i<nrc;i++){
		if(s[i]==' '){
			nrs++;
		}
		if(s[i]=='-')
			nrs++;
		if(s[i]<65)
			nrg++;
		if(s[i]>122)
			nrg++;
		if(s[i]>=91 && s[i]<=96)
			nrg++;
	}
	if(s[nrc]==' ')
		nrs--;
	if(nrs==0)
		printf("1\n");
	else
		printf("%d\n",(nrc-nrg)/nrs);
	//printf("%d %d %d %d",nrc,nrs,nrg,nrc-nrg);
	return 0;
}