#include <bits/stdc++.h>
using namespace std;
int main(){
  int N, X, Y;
  cin >> N >> X >> Y;
  string S;
  cin >> S;
  int Scnt = 0;
  for (int i = 0; i < N; i++){
    if (S[i] == 'S'){
      if (Scnt >= Y){
        S[i] == '.';
      } else {
        Scnt++;
      }
    }
  }
  if (Y > Scnt){
    cout << -1 << endl;
  } else {
    vector<string> T;
    T.push_back("");
    for (int i = 0; i < N; i++){
      if (S[i] == 'L' || S[i] == 'R'){
        T.back() += S[i];
      } else if (S[i] == 'S' && T.size() <= Scnt){
        T.push_back("");
      }
    }
    int cnt = T.size();
    /*
    cout << "cnt = " << cnt << endl;
    for (int i = 0; i < cnt; i++){
      cout << i << " " << T[i] << endl;
    }
    */
    vector<int> left(cnt), right(cnt), sum(cnt);
    for (int i = 0; i < cnt; i++){
      int sz = T[i].size();
      left[i] = 0, right[i] = 0, sum[i] = 0;
      for (int j = 0; j < sz; j++){
        if (T[i][j] == 'L'){
          left[i]--;
          right[i]--;
          sum[i]--;
        }
        if (T[i][j] == 'R'){
          left[i]++;
          right[i]++;
          sum[i]++;
        }
        left[i] = min(left[i], 0);
        right[i] = max(right[i], 0);
        //cout << "sum[i] = " << sum[i] << ", left[i] = " << left[i] << ", right[i] = " << right[i] << endl;
      }
      //cout << "sum[i] = " << sum[i] << ", left[i] = " << left[i] << ", right[i] = " << right[i] << endl;
    }
    int Rsum = 0;
    for (int i = 0; i < cnt; i++){
      Rsum += right[i];
    }
    //cout << "Rsum = " << Rsum << endl;
    if (X > Rsum){
      cout << -1 << endl;
    } else {
      vector<pair<int, int>> ob;
      int currX = 0;
      for (int i = 0; i < cnt; i++){
        if (currX + right[i] <= X){
          ob.push_back(make_pair(currX - 1, i));
          currX += right[i];
        } else if (currX == X){
          ob.push_back(make_pair(currX - 1, i));
          ob.push_back(make_pair(currX + 1, i));
        } else {
          ob.push_back(make_pair(currX - 1 - (X - currX - right[i]), i));
        }
      }
      if (Y < Scnt){
        ob.push_back(make_pair(X, Y + 1));
      }
      int M = ob.size();
      cout << M << endl;
      for (int i = 0; i < M; i++){
        cout << ob[i].first << ' ' << ob[i].second << endl;
      }
    }
  }
}