Smallest number by rearranging digits of a given number

Find the Smallest number (Not leading Zeros) which can be obtained by rearranging the digits of given number.

Sample Examples:

Input:

846903

Output:

304689

Input:

55010

Output:

10055

Source Code:

from collections import Counter

s=''.join(sorted(input()))

x=s.rfind('0')         //find the last index

c=Counter(s)       //get the frequency 

y=list(c.values())[1]    //get the [1]particular index value

print(s[x+1:(y+x)+1],s[0:x+1],s[(x+y)+1:],sep="")