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#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main(){


    FILE *ptr;
   int i;
   char ch;
   char str[100];
ptr=fopen("1.txt","w+");
ch = getc(ptr);
printf("enter the string");
getc(str);
fprintf(1.txt,%s,str);
while(ch!=EOF)
{
  if(ch >='a'&& ch<='z')
{  printf("%c",ch);

}
ch = getc(ptr);
}
fclose(ptr);
return 0;





}