// No.2525 Great Move
package main

import (
	"fmt"
	"math"
)

func main() {
	var h, s float64
	fmt.Scan(&h, &s)
	if (int64(math.Abs(h)+math.Abs(s)))%2 == 0 {
		fmt.Println("Possible")
	} else {
		fmt.Println("Impossible")
	}
}