using sorted keyword and extracting alphabets and numbers using python

s= input("Enter some string:")
s1=s2=output=''
for x in s:
    if x.isalpha():
        s1=s1+x
    else:
        s2=s2+x
print(s1)
print(s2)

output:

Enter some string:a1b2c3

abc

123

example 2:

s= input("Enter some string:")

s1=s2=output=''

for x in s:

    if x.isalpha():

        s1=s1+x

    else:

        s2=s2+x

for x in sorted(s1):

    output=output+x

for x in sorted(s2):

    output=output+x

print(output)

output:

Enter some string:a1b2c3d4

abcd1234


example 3:
s= input("Enter some string:")
output=''
for x in s:
    if x.isalpha():
        output=output+x
        previous=x
    else:
        output=output+previous*(int(x)-1)
print(output)

output:

Enter some string:a4b2c5d2

aaaabbcccccdd