#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
main(argc,argv)
int argc;
char *argv[];
{
int fd,fd1,k,i=0,status;
char buff[60],c;
int nbytes=0;
         { if ( ( fd= open (argv[1],O_RDONLY)) == -1){
            printf("\nCannot open %s", argv[1]);
            exit(1);
           }
         if ( ( fd1= open (argv[2],O_CREAT|O_WRONLY|O_TRUNC, 0666)) == -1){
            printf("\nCannot open %s", argv[2]);
            exit(1);
                }
         }
        if ( fork() !=0)
           {wait ( & status);
            execlp("wc","wc","-l",argv[2],0);}
        else {

        while  (read(fd, &c, 1) >0)
        {
           if ( c != '\n')  buff[i++]=c;
           else
                {if ( buff[i-1] == '$')
                {  for (k=0;k <i; k++)
                   write( 1, &buff[k], 1);
                   write(1,"\n",1);
                   buff[0]='\0';
                 }
                 else
                   {  for (k=0;k <i; k++)
                     if ( buff[k] >= '0' && buff[k] <= '9')
                             write( fd1, &buff[k], 1);
                     write(fd1,"\n",1);
                     buff[0]='\0';
                   }
                 i=0;
                 }
        }
      }
}