#include <stdio.h>
#define MAXLINE 200
#define NUM_LINES 100

int getline(char s[], int lim);
void qqsort(void* v[], int  left, int right);

main()
{
	int len;
	char  Line[NUM_LINES][MAXLINE];
	char*  line[NUM_LINES];
	short ii=0;

	while ( (ii<NUM_LINES) && (len = getline(Line[ii], MAXLINE)) ){;
	line[ii]=&Line[ii][0]; ii++;
	}
qqsort((void*)line,0,ii-1);
for(len=0;len<ii;len++) printf("%s",line[len]);
}


/* getline: read a line into s, return length */
/* Each string s ends with a '\n''\0'.
A length of 0 means that we hit the EOF on our first read.
 */

int getline(char s[], int lim)
{
	int c, i;
	for (i=0; i<lim-2 && (c=getchar())!=EOF && c!='\n'; i++)
		s[i] = c;
	if(c==EOF && i==0) return 0;
	s[i++] = '\n';
	s[i] = '\0';
	return i;
}