#include<string.h>
#include<stdio.h>
char a;
int gas, gas1,nrcuv,nrcar;
int main()
{freopen("text.in","r",stdin);
freopen("text.out","w",stdout);
gas=0;
while(!feof(stdin))
	{scanf("%c",&a);
gas1=gas;
	if((a>='a'&&a<='z') ||(a>='A'&&a<='Z'))
{nrcar++;
gas=1;}
	else
		gas=0;
if(gas1==0&&gas==1)
	nrcuv++;
}
printf("%d",nrcar/nrcuv);
return 0;
}