``
```cpp
#include<bits/stdc++.h>
#include<cmath>
using namespace std;
int man(){
	int a,i,t,we,w,sd,b,q;
	cin>>a;
	string s[a];
	string s1;
	for(i=0;i<a-1;i++){
		cin>>s[i];
	}cin>>s[a];
	for(i=0;i<a-1;i++){
		for(we=i+1;we<a;we++){b=1;
			t=sizeof(s[i]);w=sizeof(s[we]);
			sd=min(t,w);
			for(q=0;q<sd;q++){
				if(s[i][q]<s[we][q]){b=0;
					s1=s[i];
					s[i]=s[we];
					s[we]=s1;}}				
			if(b==1){
				if(sd==w){
						s1=s[i];
					s[i]=s[we];
					s[we]=s1;}}}}
for(i=0;i<a-1;i++){cout<<s[i];}
return 0;
}