#include<stdio.h>
#include<ctype.h>
#include<string.h>
#include<fstream.h>
char prop[30000];
FILE *g=fopen("text.out","w");


void cit()
{long n,i,nrc,nrn;
 ifstream f("text.in");

 f.getline(prop,30000);
 f.close();
 n=strlen(prop);
 nrn=nrc=0;
 for(i=0;i<strlen(prop);i++)
  {if(!isalpha(prop[i]))
    nrn++;
  if(isalpha(prop[i])&&!isalpha(prop[i+1]))
    nrc++;     }

 fprintf(g,"%ld",((n-nrn)/nrc));
}

int main()
{
  cit();
  fcloseall();
return 0;

}