wolf_sheeps

list_animals = input()
sheep_cntr = 0
for i in range(len(list_animals)-1, -1, -1):
    if list_animals[len(list_animals)-1] == "f":
        print("Please go away and stop eating my sheep")
        break
    if list_animals[i] == "s":
        sheep_cntr +=1
    if list_animals[i] == "f":
        print(f"Oi! Sheep number {sheep_cntr}! You are about to be eaten by a wolf!")