#include <stdio.h>

int caracter(char c)
{
  int i=int(c);
  if((i>=65&&i<=90)||(i>=97&&i<=122) ) return 1;
  return 0;
}

int main()
{char c;
  char backup='|';
int len=0,cuv=0;
  freopen("text.in","r",stdin);
  freopen("text.out","w",stdout);
  while( (scanf("%c",&c))!=EOF )
    { if(caracter(c)&&backup!=1&&!(caracter(backup))) cuv++;
      if(caracter(c)) len++;
      backup=c;
    }
  printf("%d\n",len/cuv);
  //  printf("cuv=%d",cuv);
  return 0;
}