#include <string>
#include <iostream>
#include <vector>
using namespace std;

int main() {
    string str;
    int el_vec = 0;
    int kol = 0;
    vector<char>str_dop;
    int w = 0;
    cout << "vvedite str: " << endl;
    getline(cin, str);
    int n;
    n = str.length();
    string str_glas;
    int l;
    cout << "vvedite str_glas: " << endl;
    getline(cin, str_glas);
    l = str_glas.length();
    int v = 0;

    for (int i = 0; i < n; i++){
        if (str[i] != '.')v++;
        if (str[i] == '.')break;
    }

    for (int i = 0; i < v; i++){
        for (int j = 0; j < l; j++){
            if(str[0] == str_glas[j]){w++; break;}

        }
    }
    if (w > 0){
        for (int i = 0; i < v; i++){
            if (str[i] != ' '){
                str_dop.push_back(str[i]);
                el_vec++;
            }
            if (str[i] == ' ')break;
        }
        str_dop.push_back(' ');
        el_vec++;
    }
    else cout << " 1 slovo nach ne s glas " << endl;

    w = 0;

    int k = 0;

    for (int i = 1; i < v; i++){
        k++;
        if ((str[i - 1] == ' ') && (str[i] != ' ')){
            for (int j = 0; j < l; j++){
                if (str[i] == str_glas[j])w++;
            }
        }

        if (w > 0){
            for (int j = k; j < v; j++){
                if (str[j] != ' '){
                    str_dop.push_back(str[j]);
                    el_vec++;
                }
                if (str[j] == ' '){
                    str_dop.push_back(' ');
                    el_vec++;
                    break;}
            }
            w = 0;
        }
        if (w = 0)continue;

    }

    for (int i = 0; i < el_vec; i++){
        if (str_dop[i] == ' ')kol++;
    }
    cout << endl << "kol-vo slov nach s glas: " << kol + 1 << endl;

    cout << endl;
    cout << "slova nach s glas: ";
    for (int i = 0; i < el_vec; i++){
        cout << str_dop[i];
    }
    cout << endl;

    int b = 1;
    vector<char>str_dop2;
    int el_vec2 = 0;
    for (int i = 0; i < n; i++){
        if (str[i] == ' '){b++;
            if (b > 2){str_dop2.push_back(' ');
                el_vec2++;
            }
        }
        if (((b % 4) == 0) && (str[i] != ' ') && (str[i] != '.')){
            str_dop2.push_back(str[i]);
            el_vec2++;
        }
    }
    cout << endl;
    cout << "slova s kratnim 4 nomerom: ";
    for (int i = 0; i < el_vec2; i++){
        cout << str_dop2[i];
    }
    cout << endl;

    return 0;
}