#include<iostream>
using namespace std;
int m,n;
int map[101][101]={};
int turmap[101][101]={};
int cmap[3][2]={},cl=0;
struct sd{
    int x,y;
}que[114514];
bool chk(int x,int y){
    if(x<0||x>=m||y<0||y>=n||map[x][y]==1) return false;
    return true;
}
int df(int x,int y){
    int head=0,tail=1;
    turmap[x][y]=-1;
    que[0].x=x,que[0].y=y;
    while(head<tail){
        int kx=que[head].x;
        int ky=que[head].y;
        for(int xx=kx-1,yy=ky;chk(xx,yy);xx--){
            if(turmap[xx][yy]<=turmap[kx][ky]+1) continue;
            
            turmap[xx][yy]=turmap[kx][ky]+1;
            que[tail].x=xx,que[tail].y=yy;
            tail++;
        }
        for(int xx=kx+1,yy=ky;chk(xx,yy);xx++){
            if(turmap[xx][yy]<=turmap[kx][ky]+1) continue;
            
            turmap[xx][yy]=turmap[kx][ky]+1;
            que[tail].x=xx,que[tail].y=yy;
            tail++;
        }
        for(int xx=kx,yy=ky-1;chk(xx,yy);yy--){
            if(turmap[xx][yy]<=turmap[kx][ky]+1) continue;
            
            turmap[xx][yy]=turmap[kx][ky]+1;
            que[tail].x=xx,que[tail].y=yy;
            tail++;
        }
        for(int xx=kx,yy=ky+1;chk(xx,yy);yy++){
            if(turmap[xx][yy]<=turmap[kx][ky]+1) continue;
            
            turmap[xx][yy]=turmap[kx][ky]+1;
            que[tail].x=xx,que[tail].y=yy;
            tail++;
        }
        head++;
    }
    return turmap[cmap[1][0]][cmap[1][1]];
}
int main(){
    freopen("lphone.in","r",stdin);
    freopen("lphone.out","w",stdout);
    
    cin>>n>>m;
    for(int i=0;i<m;i++){
        for(int j=0;j<n;j++){
            char k;cin>>k;
            if(k=='C') map[i][j]=2,cmap[cl][0]=i,cmap[cl][1]=j,cl++;
            else if(k=='*') map[i][j]=1;
            else map[i][j]=0;
        }
    }
    for(int i=0;i<m;i++) for(int j=0;j<n;j++) turmap[i][j]=19198100;
    cout<<df(cmap[0][0],cmap[0][1]);
    
    fclose(stdin);
    fclose(stdout);
    return 0;
}