Get common characters from strings

Question

I\'m looking for the way of comparing two strings and being able to get back, as separate strings:

• All the common characters,
• The uncommon characters, (al

Answer 1

def find_common_characters(msg1,msg2):
    l=[]
    msg11=msg1.replace(" ", "")
    msg22=msg2.replace(" ", "")
    for letter in msg11:
        if letter in msg22:
            l.append(letter)
    if len(l)!=0:
        return "".join(l)
    else:
        return -1
msg1="I like Python"
msg2="Java is a very popular language"
common_characters=find_common_characters(msg1,msg2)
print(common_characters)