1028A.cpp

// Gear4        
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
using namespace std;
#define DEBUG(x) cout << '>' << #x << ':' << x << endl;
#define FOR0(i,n) for(int i=0, _##i=(n); i<_##i; ++i)
#define FOR(i,l,r) for(int i=(l), _##i=(r); i<_##i; ++i)
#define FORD(i,l,r) for(int i=(r), _##i=(l); --i>=_##i; )
#define SZ(a) ((int)((a).size()))
#define printCase() "Case #" << caseNum << ": "
#define pb push_back
#define mp make_pair
#define SYNC std::ios::sync_with_stdio(false);  cin.tie(NULL);
#define ff first
#define ss second
template<typename T> using V = vector<T>;
template<typename T, typename U> using P = pair<T,U>;
using ld = long double;
using ll = long long;
#define endl '\n'
const int inf = 1e9, mod = 1e9 + 7;
const ll INF = 9e18;
const ld EPS = 1e-9, PI = acosl(-1.0);

int main() {
    SYNC
    int n, m; char x;
    cin >> n >> m;
    int il = inf, jl = inf, jr = -1, ir = -1;
    FOR(i, 1, n + 1) {
        FOR(j, 1, m + 1) {
            cin >> x;
            if(x == 'B') {
                il = min(il, i);
                jl = min(jl, j);
                ir = max(ir, i);
                jr = max(jr, j);
            }
        }
    }
    cout << ((il + ir) / 2) << ' ' << ((jl + jr) / 2);
}