#include<cstdio>
#include<cstring>
#define rep(i,a) for(int i=0;i<(a);++i)

char S[7], B[8][9];

int main()
{
	scanf( "%s", S );

	int cnt = 0;
	rep( i, 8 )
	{
		scanf( "%s", B[i] );
	
		rep( j, 8 )
			cnt += B[i][j] != '.';
	}

	if( cnt == 4 || !(cnt&1) )
		puts(S);
	else
		puts( strcmp(S, "yukiko")?"yukiko":"oda" );

	return 0;
}