using namespace std;
#include <bits/stdc++.h>
#define BEGIN ios_base::sync_with_stdio(0);cin.tie(0);
#define END return EXIT_SUCCESS;
#define FOR(I,A,B) for(int (I)=(A);(I)<(B);++(I))
#define ALL(C) (C).begin(),(C).end()
inline void solve()
{
	string first;cin>>first;
	vector<string>board(8);FOR(i,0,8)cin>>board[i];
	int cnt=0;FOR(i,0,8)FOR(j,0,8)if(board[i][j]!='.')cnt++;
	if(cnt%2==0)cout<<first<<endl;
	else cout<<(first=="oda"?"yukiko":"oda")<<endl;
}
int main(int argc,char**argv)
{
	BEGIN
	solve();
	END
}