animal_1 = input()
animal_2 = input()
animal_3 = input()

if animal_1 == "dog":
    print("mammal")
elif animal_1 == "crocodile":
    print("reptile")
elif animal_1 == "tortoise":
    print("reptile")
elif animal_1 == "snake":
    print("reptile")
else:
    print("unknown")

if animal_2 == "dog":
    print("mammal")
elif animal_2 == "crocodile":
    print("reptile")
elif animal_2 == "tortoise":
    print("reptile")
elif animal_2 == "snake":
    print("reptile")
else:
    print("unknown")

if animal_3 == "dog":
    print("mammal")
elif animal_3 == "crocodile":
    print("reptile")
elif animal_3 == "tortoise":
    print("reptile")
elif animal_3 == "snake":
    print("reptile")
else:
    print("unknown")