#zadanie 1
slowa = ["ala", "kot","pies", "kamilslimak", "zebra", "madam", "adam"]
palindromy = [slowo for slowo in slowa if slowo[::-1] == slowo]
print(palindromy)

#zadanie 2 

trojkaty = [(1,3,5), (2,2,3), (3,1,8), (3,4,5)]
poprawne_trojkaty = [trojkat for trojkat in trojkaty if 2*max(trojkat) < sum(trojkat)]
print(poprawne_trojkaty)

#zadanie 3
stopnie_fahewnheit = [32, 68, 104, 140]
stopnie_celcius = [(temp - 32) / (9/5) for temp in stopnie_fahewnheit]
print(stopnie_celcius)

#zadanie 4

string = "hello@123world!456"
alephabets = [char for char in string if char.isalpha()]
print(''.join(alephabets))