n = input()

if n[0]=='?':
  print('y')
elif n[1]=='?':
  print('u')
elif n[2]=='?':
  print('k')
elif n[3]=='?':
  print('i')
elif n[4]=='?':
  print('c')
elif n[5]=='?':
  print('o')
elif n[6]=='?':
  print('d')
elif n[7]=='?':
  print('e')
else:
  print('r')