#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'){
      Scnt++;
      if (Scnt > Y){
        S[i] == '.';
      }
    }
  }
  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.push_back("");
      }
    }
    int cnt = T.size();
    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);
      }
    }
    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;
    }
  }
}