664. Smallest Possible Number

0

Medium

Given a string representation of a non-negative integer N, remove k digits from the number to create the smallest possible new number.

Input Format

Input N and K as space-separated values.

Output Format

Print the new number that is the smallest possible.

Example

Input

1432219 3

Output

1219

Constraints

**Note:**

**1.**The length of N is less than 10^5.

**2.**The given N does not contain any leading zero.

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