#include<iostream>
#include<stdio.h>
#include<stdlib.h>
using namespace std;
int main()
{
char sen[100];
long int c=0,w=0,i;
//freopen("in.txt","r",stdin);
while(gets(sen))
{
c=0;w=0;
for(i=0;sen[i];i++)
{
if((sen[i]>='A'&&sen[i]<='Z')||(sen[i]>='a'&&sen[i]<='z'))
w=1;
else
{
if(w)c++;
w=0;
}
}
cout<<c<<endl;
c=0;w=0;
}
exit(0);
}
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