#include<bits/stdc++.h>
using namespace std;
int a[3][4],b[3][4];
string n;
int main(){
    cin>>n;
    for(int i = 0;i<n.size();i++){
        int x = i/3;
        int y = i%3;
        if(i%2==1){
            a[x][0]++;
            a[y][1]++;
            a[x==y][2]++;
            a[(x+y==2)][3]++;
            if(a[x][0]==3||a[y][1]==3||a[x==y][2]==3||a[(x+y==2)][3]==3){
                cout<<"xiaoa wins."<<endl;
                return 0;
            }
        }
        if(1%2==0){
            b[x][0]++;
            b[y][1]++;
            b[x==y][2]++;
            b[(x+y==2)][3]++;
            if(b[x][0]==3||b[y][1]==3||b[x==y][2]==3||b[(x+y==2)][3]==3){
                cout<<"uim wins."<<endl;
                return 0;
            }
        }
    }
    cout<<"drew."<<endl;
    return 0;
}

题目

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