#include <algorithm>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <deque>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <utility>
#include <vector>
#define p(s) cout<<(s)<<endl
#define REP(i,n,N) for(int i=n;i<N;i++)
#define RREP(i,n,N) for(int i=N-1;i>=n;i--)
#define CK(n,a,b) ((a)<=(n)&&(n)<(b))
#define F first
#define S second
typedef long long ll;
using namespace std;
const int inf = 1e9+7;

string first,second, s;
int cnt;
int main() {
    cin>>first;
    if(first=="oda"){
        second="yukiko";
    }else{
        second="oda";
    }
    REP(i,0,8){
        cin>>s;
        for(auto ss:s){
            if(ss!='.') cnt++;
        }
    }
    if(cnt%2){
        p(second);
    }else{
        p(first);
    }
    return 0;
}