def yuki(A):
    if A == "1": return "y"
    elif A == "2": return "u"
    elif A == "3": return "k"
    elif A == "4": return "i"
    elif A == "5": return "c"
    elif A == "6": return "o"
    elif A == "7": return "d"
    elif A == "8": return "e"
    elif A == "9": return "r"

while True:
    i = input()
    if i == "0":
        break
    print(yuki(i))