#include<algorithm>
#include<iostream>
#include<cmath>
#include<string>
#include<cstring>
#include<cstdlib>
#include<cstdio>
#include<queue>
using namespace std;
int main()
{
int m,n;
cin>>m>>n;
if(m==0)
if(n==0)
cout<<"0"<<" "<<"0"<<endl;
else
cout<<"Impossible"<<endl;
else
if(m>=n)
{
if(n==0)
cout<<m<<" "<<m<<endl;
else
cout<<m<<" "<<m+n-1<<endl;
}else
{
cout<<n<<" "<<m+n-1<<endl;
}
return 0;
}