#include<bits/stdc++.h>
using namespace std;
int fx[8]={-2,-2,-1,-1,2,2,1,1};
int fy[8]={-1,2,-2,2,1,-1,2,-2};
int n,m,dx,dy,kx,ky;
char a[151][151];
int b[151][151];
void dfs(int x,int y,int k){
	b[x][y]=k;
//	cout<<x<<" "<<y<<" "<<k<<endl;
	for(int i=0;i<=7;i++){
		int tx=x+fx[i];
		int ty=y+fy[i];
		if(tx>=1&&tx<=m&&ty>=1&&ty<=n&&a[tx][ty]!='*'&&k+1<b[tx][ty]){
			dfs(tx,ty,k+1);
		}
	}
}
int main(){
   cin>>n>>m;
   for(int i=1;i<=m;i++){
   	for(int j=1;j<=n;j++){
   		cin>>a[i][j];
   		b[i][j]=INT_MAX;
   		if(a[i][j]=='K'){
   			dx=i;
   			dy=j;
   			
   		}
   		if(a[i][j]=='H'){
   			kx=i;
   			ky=j;
   		}
   	}
   }
//   cout<<dx<<dy;
   dfs(dx,dy,1);
//   for(int i=1;i<=n;i++){
//   	for(int j=1;j<=m;j++){
//   		cout<<setw(20)<<b[i][j];
//   	}
//   	cout<<endl;
//   }
   cout<<b[kx][ky];
   return 0;
}
//  1 2 3 4 5
//1 0 1 0 1 0
//2 1 0 0 0 1 
//3 0 0 1 0 0 
//4 1 0 0 0 1
//5 0 1 0 1 0
//x:-2 -2 -1 -1 2 2  1 1 
//y:-1 2  -2 2  1 -1 2 -2
/**************************************************************
	Problem: 1441
	User: chenjingqi
	Language: C++
	Result: Wrong Answer
****************************************************************/