#include<bits/stdc++.h>
using namespace std;
int x,y;
int qx,qy,gx,gy;
char a[101][101];
int d[30][30];
int fx[4]={0,1,0,-1};
int fy[4]={1,0,-1,0}; 
void dfs(int x,int y,int k){
	for(int i=1;i<=4;i++){
		d[x][y]=0;
	    int tx=x+fx[i];
		int ty=y+fy[i];
		if(tx>=1&&tx<=x&&ty>=1&&ty<=y&&a[x][y]!='#'){
			if(d[tx][ty]=='x'&&k+2<d[tx][ty]){
				dfs(tx,ty,k+2);
			}
			else if(d[tx][ty]!='x'&&k+1<d[tx][ty]){
				dfs(tx,ty,k+1);
			}
		}	
	}
	
}
int main(){
	cin>>x>>y;
	for(int i=1;i<=x;i++){
		for(int j=1;j<=y;j++){
		    cin>>a[i][j];
		    d[i][j]=INT_MAX;
		    if(a[i][j]=='r'){
		    	qx=i;
		    	qy=j;
		    }else if(a[i][j]=='a'){
		    	gx=i;
		    	gy=j;
		    }
	    }
	}
	dfs(qx,qy,0);
	int zdbs=d[gx][gy];
	if(zdbs==INT_MAX) cout<<"Impossible";
	else cout<<zdbs;
	return 0;
}
/**************************************************************
	Problem: 1901
	User: zengdongxin
	Language: C++
	Result: Wrong Answer
****************************************************************/