参考答案：

#include<iostream>
#include<algorithm>
#include<string>
using namespace std;
int main()
{
    string s1, s2;
    cin >> s1 >> s2;

    if (s2[0] == 'e' && s1[0] == 't' || s2[0] == 't' && s1[0] == 'c' || s2[0] == 'c' && s1[0] == 'm' || s2[0] == 'm' && s1[0] == 'e') cout << "tiangou txdy";
    else cout << "tiangou yiwusuoyou";
    return 0;
}