#include <bits/stdc++.h>
using namespace std;
int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};
inline int GA(long long n, vector<long long>& vec) {
  for (int i = 0; i < n; ++i) {
    long long x;
    cin >> x;
    vec.push_back(x);
  }
  return 0;
}
inline int GAEG(long long m, vector<long long> vec[]) {
  for (int i = 0; i < m; ++i) {
    long long x, y;
    cin >> x >> y;
    x--, y--;
    vec[x].push_back(y);
    vec[y].push_back(x);
  }
  return 0;
}
bool isvalid(long long xx, long long yy, long long n, long long m) {
  return (xx >= 0 && xx < n && yy >= 0 && yy < m);
}
long long pw(long long x, long long y) {
  if (y == 0) return 1;
  long long o = y / 2;
  long long f = pw(x, o);
  if (y % 2) {
    return (((f * f)) * x);
  } else
    return (f * f);
}
vector<long long> v[200001];
vector<long long> o;
vector<long long> z;
vector<long long> zro;
vector<long long> on;
int main() {
  ios_base::sync_with_stdio(NULL);
  cin.tie(NULL);
  cout.tie(NULL);
  ;
  string str;
  cin >> str;
  long long aa = 1;
  bool bl = false;
  if (str[0] == '1' || str[str.size() - 1] == '1') {
    cout << "-1" << endl;
    return 0;
  }
  long long cnt = 0;
  for (int i = 0; i < str.size(); ++i) {
    if (str[i] == '1') {
      if (!zro.empty()) {
        long long xx = zro.back();
        zro.pop_back();
        v[xx].push_back(i);
        on.push_back(xx);
      } else {
        cout << "-1" << endl;
        return 0;
      }
    } else {
      if (!on.empty()) {
        long long xx = on.back();
        on.pop_back();
        v[xx].push_back(i);
        zro.push_back(xx);
      } else {
        v[cnt].push_back(i);
        zro.push_back(cnt++);
      }
    }
  }
  if (!on.empty()) {
    cout << "-1" << endl;
    return 0;
  }
  for (int i = 0; i < cnt; ++i) {
    if (str[v[i][v[i].size() - 1]] == '1') {
      cout << "-1" << endl;
      return 0;
    }
  }
  cout << cnt << endl;
  for (int i = 0; i < cnt; ++i) {
    cout << v[i].size() << " ";
    for (auto j : v[i]) cout << j + 1 << " ";
    cout << endl;
  }
  return 0;
}
