#include<bits/stdc++.h>

using namespace std;

struct dsu_t{
    vector<int> par;
    dsu_t(int n) : par(n, -1) {}
    int find(int v){
        if(par[v] < 0) return v;
        else return par[v] = find(par[v]);
    }
    bool same_set(int a, int b){
        return find(a) == find(b);
    }
    void unite(int a, int b){
        a = find(a);
        b = find(b);
        if(a == b) return;
        par[b] = a;
    }
};

int main(){
    cin.tie(0)->sync_with_stdio(false);
    string line, s;
    getline(cin, line);
    istringstream is(line);
    vector<pair<string, char>> text;
    vector<string> v;
    vector<char> after;
    while(is>>s){
        char a = '!';
        if(s.back() == ',' || s.back() == '.'){
            a = s.back();
            s.pop_back();
        }
        v.push_back(s);
        after.push_back(a);
    }
    const int n = v.size();
    map<string, int> get_id;
    int id = 2;
    for(string s : v){
        if(!get_id.count(s)){
            get_id[s] = id;
            id += 2;
        }
    }
    dsu_t uf(id);
    for(int i = 1; i < n; i++){
        int a = get_id[v[i-1]] + 1;
        int b = get_id[v[i]];
        if(after[i-1] != '.')
            uf.unite(a, b);
        if(after[i-1] == ','){
            uf.unite(1, a);
            uf.unite(1, b);
        }
    }
    string ans;
    for(int i =0; i<n; i++){
        ans += v[i];
        if(after[i] != '!'){
            ans += after[i];
        } else{
            int x = get_id[v[i]] + 1;
            if(uf.same_set(x, 1))
                ans += ',';
        }
        ans += ' ';
    }
    cout<<ans<<"\n";
    
    return 0;
}