#include <stdio.h>
#include <ctype.h>

int cutWords()
{
  char txt;

  int cnt=0,cntletter=0;
  for( txt=getchar(); txt!=EOF; txt=getchar())
  {
    if(cnt<5&&txt!=' ')
    {
    cnt++;
    putchar(txt);
    }
    if(txt==' '&&cnt<=5)
    {
      putchar('\n');
      cnt=0;
    }



      if(cnt==6 && (txt==' '||txt=='\n'))
    {
      putchar('\n');
      cnt=0;
      cntletter++;

    }

    if(txt==' '&&(txt=getchar())!=' ')
    {
      putchar(txt);
      cnt++;
    }

  }

 if(cnt==6)
   ++cntletter;
 return cntletter;
}

int main()
{
  printf("%d\n",cutWords());

}