#include <bits/stdc++.h>
using namespace std;
const long double E = 2.71828182845904523536;
const long double pi = acos(-1);
const double eps = 1e-9;
const long long mod = 1e9 + 7;
const long long inf = 1LL << 30;
const int N = 100100;
set<int> s1, s0;
vector<vector<int>> ans;
vector<int> v;
int k;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  string s;
  cin >> s;
  int n = s.length();
  for (int i = 0; i < n; i++) {
    if (s[i] == '1')
      s1.insert(i + 1);
    else
      s0.insert(i + 1);
  }
  while (s1.size()) {
    int pos0 = *s0.begin();
    s0.erase(pos0);
    v.push_back(pos0);
    auto ptr1 = s1.lower_bound(pos0);
    if (ptr1 == s1.end()) {
      printf("-1");
      return 0;
    }
    while (1) {
      ptr1 = s1.lower_bound(pos0);
      if (ptr1 == s1.end()) {
        break;
      }
      int pos1 = *ptr1;
      v.push_back(pos1);
      s1.erase(pos1);
      auto ptr0 = s0.lower_bound(pos1);
      if (ptr0 == s0.end()) {
        printf("-1");
        return 0;
      }
      pos0 = *ptr0;
      v.push_back(pos0);
      s0.erase(pos0);
    }
    ans.push_back(v);
    v.clear();
    k++;
  }
  for (auto x : s0) {
    v.clear();
    v.push_back(x);
    ans.push_back(v);
    k++;
  }
  printf("%d\n", k);
  for (auto vec : ans) {
    printf("%d ", vec.size());
    for (auto x : vec) printf("%d ", x);
    printf("\n");
  }
  return 0;
}
