题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    string s[3];  //string类型的列表
    cin >> s[1] >> s[2];
    if (s[1] == s[2])
        cout << s[1];
    else if (s[1] > s[2])
        cout << s[2] << " " << s[1];
    else
        cout << s[1] << " " << s[2];
    return 0;
}