#include <bits/stdc++.h>
using namespace std;
const int maxn = 2e5 + 10;
vector<int> a[maxn];
string s;
int i, ma = -1, ans = 0, f = 1;
int main() {
  cin >> s;
  for (i = 0; i < s.size(); i++) {
    if (s[i] == '0')
      a[++ans].push_back(i);
    else {
      if (ans == 0) {
        f = 0;
        break;
      }
      a[ans--].push_back(i);
    }
    ma = max(ans, ma);
  }
  if (ma != ans) f = 0;
  if (!f) {
    cout << -1;
    return 0;
  } else {
    cout << ma << "\n";
    for (i = 1; i <= ma; i++) {
      cout << a[i].size() << " ";
      for (int j = 0; j < a[i].size(); j++) {
        cout << a[i][j] + 1 << " ";
      }
      cout << "\n";
    }
  }
}
