# Make a program that filters a list of strings and returns a list with only your friends name in it.

# If a name has exactly 4 letters in it, you can be sure that it has to be a friend of yours! Otherwise, you can be sure he's not...

# Ex: Input = ["Ryan", "Kieran", "Jason", "Yous"], Output = ["Ryan", "Yous"]

# i.e.

# friend ["Ryan", "Kieran", "Mark"] `shouldBe` ["Ryan", "Mark"]
# Note: keep the original order of the names in the output.

#Best
def friend(x):
    return [f for f in x if len(f) == 4]


#mine
def friend(x):
    #Code
    z=[]
    for i in x:
        if len(i)==4:
            z.append(i)
    return z        
#     return (y  if (len(y)==4) for y in x )
