#include <iostream>
#include <fstream>
#include <cstdio>
#include <vector>
#include <string>
#include <cctype>
#include <iomanip>
//#include <cmath>
#include <iterator>
#include <utility>
#include <algorithm>
#include <cstdlib>
#include <math.h>

using namespace std;

int main()
{
    setlocale(LC_ALL, "Russian");
    ifstream in("input.txt");
    ofstream out("output.txt");
    unsigned char c;
    vector <vector <int> > vec(33, vector <int>(33, 0));
    int counter = 0;
    int last_f = -1, last_s = -1;
    bool flag = false;
    unsigned char first, second;
    while (!in.eof())
    {
        in >> c;
        c = tolower(c);
        if (((int) ((unsigned char) ('а')) <= (int)c && (int)c <= (int) ((unsigned char) ('я'))) || ((int) c == 184))
        {
            if (!flag)
            {
                second = c;
                flag = true;
            }
            else
            {
                first = second;
                second = c;
                int fcode = (int)first;
                int lcode = (int)second;
                if (fcode == 184)
                {
                    if (lcode == 184)
                    {
                        vec[0][0]++;
                        last_f = 0;
                        last_s = 0;
                    }
                    else
                    {
                        lcode -= 223;
                        vec[0][lcode]++;
                        last_f = 0;
                        last_s = lcode;
                    }
                }
                else
                {
                    fcode -= 223;
                    if (lcode == 184)
                    {
                        vec[fcode][0]++;
                        last_f = fcode;
                        last_s = 0;
                    }
                    else
                    {
                        lcode -= 223;
                        vec[fcode][lcode]++;
                        last_f = fcode;
                        last_s = lcode;
                    }
                }
                counter++;
            }
        }
        else
            flag = false;
    }
    if (last_f != -1)
        vec[last_f][last_s]--;
    int count_f = 0;
    int count_s = 0;
    flag = false;
    vector < pair <double, string> > SortResult;
    double Result;
    string temp;
    for(int i = 1; i < 33; i++) {
        for(int j = 1; j < 33; j++) {
            if(count_f == 6) {
                flag = true;
                if(count_s == 6) {
                    Result = (((double)vec[0][0] / counter) * 1000) / 1000;
                    temp = (unsigned char)(184);
                    temp += (unsigned char)(184);
                    SortResult.push_back(make_pair(Result, temp));
                    j--;
                }
                else {
                    Result = (((double)vec[0][j] / counter) * 1000) / 1000;
                    temp = (unsigned char)(184);
                    temp += (unsigned char)(j + 223);
                    SortResult.push_back(make_pair(Result, temp));
                }
                count_s++;
            }
            else {
                if(count_s == 6) {
                    Result = (((double)vec[i][0] / counter) * 1000) / 1000;
                    temp = (unsigned char)(i + 223);
                    temp += (unsigned char)(184);
                    SortResult.push_back(make_pair(Result, temp));
                }
                else {
                    Result = (((double)vec[i][j] / counter) * 1000) / 1000;
                    temp = (unsigned char)(i + 223);
                    temp += (unsigned char)(j + 223);
                    SortResult.push_back(make_pair(Result, temp));
                }
                count_s++;
            }
        }
        if (flag) {
            i--;
            flag = false;
        }
        count_f++;
        count_s = 0;
    }
    sort(SortResult.begin(), SortResult.end());
    for(int i = (int) SortResult.size() - 1; i >= 0; i--) {
        if(SortResult[i].first != 0) {
            out << SortResult[i].second << " = " << fixed << setprecision(3) << SortResult[i].first << endl;
            cout << SortResult[i].second << " = " << fixed << setprecision(3) << SortResult[i].first << endl;
        }
    }
    in.close();
    out.close();
    return 0;
}