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#include <iostream>
#include <queue>
#include <vector>

using namespace std;

const int dx[4]={1,0,-1,0};
const int dj[4]={0,1,0,-1};

int main()
{
    int n,m,k;
    cin>>n>>m;
    cin>>k;
    char x[n][m];
    vector<pair<int,int>>v;
    for(int i = 0;i<n;i++){
        for(int j = 0;j<m;j++){
            cin>>x[i][j];
            if(x[i][j]=='C'){
              v.push_back(make_pair(i,j));
            }
        }
    }
    int si;
    int sj;
    int cnt[n][m];
    for(int i = 0;i<n;i++){
        for(int j = 0;j<m;j++){
            cnt[i][j]=0;
        }
    }
    for(int i = 0;i<v.size();i++){
        queue<int>q;
        si=v[i].first;
        sj=v[i].second;
        q.push(si);
        q.push(sj);
        q.push(0);
        vector<vector<bool>>visited(n,vector<bool>(m,false));
        while(!q.empty()){
          int ci=q.front();
          q.pop();
          int cj=q.front();
          q.pop();
          int dist=q.front();
          q.pop();
          for(int p = 0;p<4;p++){
            int ti=ci+dx[p];
            int tj=cj+dj[p];
            if(ti>=0 && ti<n && tj>=0 && tj<m && x[ti][tj]!='#' && visited[ti][tj]==false && dist+1<=k){
                visited[ti][tj]=true;
                q.push(ti);
                q.push(tj);
                q.push(dist+1);
                cnt[ti][tj]++;
            }
          }
       }
    }
    int najgolem=0;
    int ri;
    int rj;
    for(int i = 0;i<n;i++){
        for(int j = 0;j<m;j++){
            if(cnt[i][j]>najgolem and x[i][j] != 'C'){
                najgolem=cnt[i][j];
                ri=i;
                rj=j;
            }
        }
    }
  cout<<ri + 1<<" "<<rj + 1<<endl;
}