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#include <iostream>
#include <queue>
 
using namespace std;
 
int main()
{
    int n;
    int m;
    cin>>n>>m;
    int n1;
    int m1;
    int k;
    int k1;
 
 
    queue<int>q;
    char matrica[n][m];
    for(int x=0; x<n; x++){
        for(int x1=0; x1<m; x1++){
            cin>>matrica[x][x1];
        }
    }
    for(int y=0; y<n; y++){
        for(int y1=0; y1<m; y1++){
        if(matrica[y][y1]=='P'){
        n1=y;
        m1=y1;
        }
        if(matrica[y][y1]=='K'){
        k=y;
        k1=y1;
        }
        }
    }
    bool matrica1[n][m];
    bool matrica2[n][m];
    bool matrica3[n][m];
    for(int l=0; l<n; l++){
        for(int l1=0; l1<m; l1++){
            matrica1[l][l1]=false;
            matrica2[l][l1]=false;
            matrica3[l][l1]=false;
        }
    }
    q.push(n1);
    q.push(m1);
    q.push(0);
    q.push(1);
 
    int di1[]={-1,1,0,0,};
    int dj1[]={0,0,-1,1};
    int di2[]={-2,2,0,0};
    int dj2[]={0,0,-2,2};
    int di3[]={-3,3,0,0};
    int dj3[]={0,0,-3,3};
 
    int ti;
    int tj;
 
    while(!q.empty()){
    int ci=q.front();
    q.pop();
    int cj=q.front();
    q.pop();
    int cekori=q.front();
    q.pop();
    int brcekori=q.front();
    q.pop();
    if((ci==k)and(cj==k1)){
        cout<<cekori;
        break;
    }
    if(brcekori==1){
    for(int i=0; i<4; i++){
    ti=ci+di1[i];
    tj=cj+dj1[i];
    if((ti>=0)and(ti<n)){
        if((tj>=0)and(tj<m)){
            if(matrica[ti][tj]!='#'){
                if(matrica1[ti][tj]==false){
                 q.push(ti);
                 q.push(tj);
                 q.push(cekori+1);
                 q.push(brcekori=2);
                 matrica1[ti][tj]=true;
                }
            }
        }
    }
    }
    }
    else if(brcekori==2){
    for(int i=0; i<4; i++){
        ti=ci+di1[i];
        tj=cj+dj1[i];
        if((ti>=0)and(ti<n)and(tj>=0)and(tj<m)and(matrica[ti][tj]!='#')){
        ti=ci+di2[i];
        tj=cj+dj2[i];
        if((ti>=0)and(ti<n)and(tj>=0)and(tj<m)and(matrica[ti][tj]!='#')and(matrica2[ti][tj]==false)){
        q.push(ti);
        q.push(tj);
        q.push(cekori+1);
        q.push(brcekori=3);
        matrica2[ti][tj]=true;
        }
    }
 
    }
    }
    else if(brcekori==3){
    for(int i=0; i<4; i++){
        ti=ci+di1[i];
        tj=cj+dj1[i];
        if((ti>=0)and(ti<n)and(tj>=0)and(tj<m)and(matrica[ti][tj]!='#')){
        ti=ci+di2[i];
        tj=cj+dj2[i];
        if((ti>=0)and(ti<n)and(tj>=0)and(tj<m)and(matrica[ti][tj]!='#')){
        ti=ci+di3[i];
        tj=cj+dj3[i];
        if((ti>=0)and(ti<n)and(tj>=0)and(tj<m)and(matrica[ti][tj]!='#')and(matrica3[ti][tj]==false)){
        q.push(ti);
        q.push(tj);
        q.push(cekori+1);
        q.push(brcekori=1);
        matrica3[ti][tj]=true;
        }
        }
    }
    }
    }
    }
     
 
 
    return 0;
}