#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  vector<int> vec(1, 0);
  vector<vector<int> > list;
  int counter = 0, i, j;
  for (i = 0; i < s.length(); i++) {
    if (s[i] == '0') {
      if (list.size() > counter) {
        list[counter].push_back(i);
      } else {
        vec[0] = i;
        list.push_back(vec);
      }
      counter++;
    } else if (s[i] == '1') {
      if (counter - 1 < 0) {
        cout << -1;
        return 0;
      } else {
        list[--counter].push_back(i);
      }
    }
  }
  if (counter < list.size()) {
    cout << -1;
    return 0;
  }
  cout << list.size() << "\n";
  for (i = 0; i < list.size(); i++) {
    cout << list[i].size() << " ";
    for (j = 0; j < list[i].size(); j++) {
      cout << list[i][j] + 1 << " ";
    }
    cout << "\n";
  }
  return 0;
}
