#include<stdio.h>

#define  MAXLINE  1000

int getline(char line[], int max);
int strindex(char source[], char searchfor[]);

char pattern[]="dan";

int main()
{
  char line[MAXLINE];
  int found=0;
  while(getline(line,MAXLINE)>0)
   if(strindex(line,pattern) >= 0)
     {
       printf("%s",line);
       found ++;
     }
 return found;
}

int getline(char s[], int lim)
{
  int c, i;
  i=0;
  while(--lim > 0 && (c=getchar()) != EOF && c!='\n')
    s[i++]=c;
  if(c=='\n')
   s[i++]=c;
  s[i]='\0';
 return i;
}

int strindex(char s[], char t[])
 {
  int i,j,k;
   for(i=0; s[i]!='\0'; i++)
    {
     for(j=i, k=0; t[k]!='\0' && s[j]==t[k]; j++, k++);
     if(k>0 && t[k] == '\0')
      return i;
    }
 return -1;
}