C :

#include<stdio.h>
#include<string.h>
#define m 100
int main()
{     
    char str1[m],str2[m],str3[m],p[m];
    gets(str1);
    gets(str2);
    gets(str3);
    if(strcmp(str1,str2)>0)
    {   
        strcpy(p,str1);
        strcpy(str1,str2);
        strcpy(str2,p);
    }
    if(strcmp(str1,str3)>0)
    {   
        strcpy(p,str1);
        strcpy(str1,str3);
        strcpy(str3,p);
    }
    if(strcmp(str2,str3)>0)
    {   
        strcpy(p,str2);
        strcpy(str2,str3);
        strcpy(str3,p);
    }
    puts(str1);

    puts(str2);
    
    puts(str3);

 
    return 0;
}     
                                              

C++ :

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

void Swap(char **q1, char**q2);

int main()
{    
    int i=0;
    char *p1,*p2,*p3, str1[80],str2[80],str3[80];
 p1=str1; p2=str2; p3=str3;
    gets(str1);
	gets(str2);
	gets(str3);
if (strcmp(p1, p2)>0)
        Swap(&p1, &p2);  
if (strcmp(p1, p3)>0)
        Swap(&p1, &p3);
if (strcmp(p2, p3)>0)
        Swap(&p2, &p3);
 printf("%s\n%s\n%s\n",p1,p2,p3);
 return(0);
}

void Swap(char **q1, char* *q2)
{char *t;
 t= *q1;
 *q1 = *q2;
 *q2 = t;
}

Java :

import java.util.Scanner;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);
		
		String s1 = input.next();
		String s2 = input.next();
		String s3 = input.next();
		String s;
		if(s1.compareTo(s2) > 0){
			s = s1;
			s1 = s2;
			s2 = s;
		}
		if(s1.compareTo(s3) > 0){
			s = s1;
			s1 = s3;
			s3 = s;
		}
		if(s2.compareTo(s3) > 0){
			s = s2;
			s2 = s3;
			s3 = s;
		}
		
		System.out.print(s1 + "\n" + s2 + "\n" + s3);
	}
}

Python :

a =[ map(lambda x:(x), raw_input().split())[0] for i in range(3)]
a.sort()
j = ''
for x in a:

    j+=x+ '\n'

print j