# Reset a bit

Execution time limit is 1 second

Runtime memory usage limit is 64 megabytes

Given two integers a and k. Find the number that is obtained from a by reseting the value of k-th bit to 0. The least significant bit has number 0.

## Input

Two numbers a and k (0 ≤ a ≤ `10^9`

).

## Output

Print the number with reset k-th bit.

## Examples

Input #1

Answer #1

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