#pragma hdrstop
#pragma argsused

#ifdef _WIN32
#include <tchar.h>
#else
typedef char _TCHAR;
#define _tmain main
#endif

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

class CText {
    int strs;
    vector<string> s;
    int seps_col;
    char seps[5];
public:
    void get_seps();
    void get_first();
    void read();
    void write();
    bool is_sep(char ch);
    void processing();
    void replace();
};

void CText::get_seps() {
    cout << "Enter number of separators" << endl;
    cin >> seps_col;
    cout << "Enter separators" << endl;
    for (int i = 0; i < seps_col; i++)
        cin >> seps[i];
}

void CText::get_first() {
    string str;
    cout << "Enter string to insert as first or enter \"-_-\" to skip" << endl;
    cin >> str;
    cout << str << endl;
    if (str != "-_-") {
        strs++;
        s.insert(s.begin(), str);
    }
}

void CText::read() {
    ifstream in("input.txt");
    strs = 0;
    char ch;
    int prev = 0;
    int k = 0;
    string str;
    in.get(ch);
    while (in) {
        if (ch != '\n')
            str += ch;
        else {
            s.push_back(str);
            strs++;
            if (prev == str.size()) k++;
            else k = 0;
            if (k == 4) {
                str.clear();
                get_first();
                break;
            }
            prev = str.size();
            str.clear();
        }
        in.get(ch);
    }
    if (str.size()) {
        s.push_back(str);
        strs++;
    }
    in.close();
}

void CText::write() {
    ofstream out("output.txt");
    if (!out)
        cout << "Not enought file" << endl;

    for (unsigned int i = 0; i < s.size(); i++) {
        for (unsigned int j = 0; j < s[i].size(); j++)
            out << (s.at(i)).at(j);
        out << endl;
    }
    out.close();
}

bool CText::is_sep(char ch) {
    for (int i = 0; i < seps_col; i++)
        if (ch == seps[i])
            return true;
    return false;
}

void CText::processing() {
    int chet = 0, nechet = 0;
    for (int i = 0; i < strs; i++)
        for (int j = 0; j < s[i].length(); j++)
            if (s[i][j] >= '0' && s[i][j] <= '9')
                if ((i + 1) % 2 == 0)
                    chet++;
                else
                    nechet++;
    if (chet < nechet)
        replace();
}

void CText::replace() {
    for (int i = 0; i < strs; i++) {
        bool flag = false;
        for (int j = 0; j < s[i].length(); j++)
            if (s[i][j] >= '1' && s[i][j] <= '9')
                if (!is_sep(s[i][j])) {
                    s[i][j] = s[i][j] - '1' + 'a';
                    flag = true;
                }
        if (!flag) {
            s[i].insert(s[i].begin(), seps[0]);
            s[i].insert(s[i].begin(), seps[0]);
            s[i].insert(s[i].begin(), seps[0]);
        }
    }
}

int _tmain(int argc, _TCHAR* argv[]) {
    system("chcp 1251");
    char rdels[5];
    int n, i;
    CText text;

    text.get_seps();
    text.read();
    text.processing();
    text.write();

    system("pause");
    return 0;
}