#Your code go here:
x = 20
while x > 0:
    if x % 5:
        print(x)
    else: 
        print(str(x)+"!")
        
    x -= 1

print("LIFTOFF")

# x = 20
# while x >= -1:
#     if x % 5 is 0:
#         print(str(x)+"!")
#         i=-1
#     elif x % 5 is not 0:
#         print(i)
#         x -= 1

# i = 20
# while i >-1:
# if i % 5 is 0:
# print(str(i) +"!")
# i-=1
# elif i % 5 is not 0:
# print(i)
# i-=1
# print("LIFTOFF")
