题解

#include<iostream>
#include<cmath>
using namespace std;
string s1,s2;
int main(){
    cin>>s1>>s2;
    if(s1==s2){
        cout<<s1;
        return 0;
    }
    for(int i=0;i<max(s1.size(),s2.size());i++){
        if(s1[i]<s2[i]){
            cout<<s1<<" "<<s2;
            return 0;
        }
        if(s1[i]>s2[i]){
            cout<<s2<<" "<<s1;
            return 0;
        }
    }
}