#define _CRT_SECURE_NO_WARNINGS
#include "bits/stdc++.h"
using namespace std;
#define all(a) a.begin(), a.end()
using namespace std;
typedef long double ld;
signed main() {
#ifdef _DEBUG
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    string s; cin >> s;
    vector<vector<int>> res;
    deque<int> null;
    set<int> close, open;
    for (int i = 0; i < (int)s.size(); i++) {
        if (s[i] == '1') {
            if (!close.empty()) {
                res[*close.begin()].push_back(i);
                open.insert(*close.begin());
                close.erase(*close.begin());
            }
            else {
                res.push_back({});
                if (null.empty()) {
                    cout << -1;
                    return 0;
                }
                res.back().push_back(null.front());
                res.back().push_back(i);
                open.insert((int)res.size() - 1);
                null.pop_front();
            }
        }
        if (s[i] == '0') {
            if(open.empty()) {
                null.push_back(i);
            }
            else {
                res[*open.begin()].push_back(i);
                close.insert(*open.begin());
                open.erase(*open.begin());
            }
        }
    }
    if (!open.empty()) {
        cout << -1 << '\n';
    }
    else {
        cout << (int)res.size() + (int)null.size();
        cout << '\n';
        for (vector<int>& it : res) {
            cout << (int)it.size() <<  ' ';
            for (int i = 0; i < (int)it.size(); i++) {
                cout << it[i] + 1 << ' ';
            }
            cout << '\n';
        }
        for (int i = 0; i < (int)null.size(); i++) {
            cout << "1 " << null[i] + 1 << '\n';
        }
    }

}