senin=input() ls=[] cnt=0 for i in range(8): ls=list(input()) cnt+=ls.count("w") cnt+=ls.count("b") if senin=="oda" and cnt%2==0: print("oda") elif senin=="oda" and cnt%2==1: print("yukiko") elif senin=="yukiko" and cnt%2==0: print("yukiko") elif senin=="yukiko" and cnt%2==1: print("yukiko")