For this Question: You are given a String S and two empty strings A and B. You are allowed to perform following two operations.
1. Remove an element from start of S and add it to the end of B.
2. Remove an element from end of B and add it to the end of A.

Find the lexicographical minimum string A that we can obtain using the above procedure.

Note: The final length of string A must be equal to initial length of string S.Input contains string S containing only lowercase alphabets.

Constraints
1 <= |S| <= 100000Print the lexicographical minimum string A that we can obtain.Input
cab

Output
abc

Input
acdb

Output
abdc, I have written this Solution Code: s = input()
b = []
a = ""
k = 0

for i in "abcdefghijklmnopqrstuvwxyz":

	if(i not in s[k:]):
		continue
	for j in s[k:]:
		while(b and b[-1] <= i):
			a += b.pop()
		if(i == j):
			a += j
			if(i not in s[k+1:]):
				k+=1
				break
			else:
				k += 1
				if(len(a) == len(s)):
					break
				continue
		if(len(a) == len(s)):
			break
		b.append(j)
		k += 1
	if(len(a) == len(s)):
		break

while(b):
	a += b.pop()
print(a), In this Programming Language: Python, Now tell me if this Code is compilable or not?