import java.util.Scanner;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;

public class Parser {
    public static void main(String[] args){
        int[] f1 =  new int[35];
        int[][] f2 = new int[35][35];
        for (int i = 0; i < 35; i++) {
            f1[i] = 0;
            for (int j = 0; j < 35; j++) f2[i][j] = 0;
        }

        try{
            char[] letters = "абвгґдеєжзиіїйклмнопрстуфхцчшщьюя’ ".toCharArray();
            char[] bletters = "АБВГҐДЕЄЖЗИІЇЙКЛМНОПРСТУФХЦЧШЩЬЮЯ’ ".toCharArray();
            int total = 0;
            FileInputStream fstream = null;
            // command line parameter
            if(args.length != 1) {
                System.err.println("Invalid command line, exactly one argument required");
                System.exit(1);
            }
            
            try {
                fstream = new FileInputStream(args[0]);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            Scanner sc = null;
            try {
                int i = 0;
                sc = new Scanner(fstream, "UTF-8");
                while (sc.hasNextLine()) {
                    int prev = 34;
                    int curr = 34;
                    String line = sc.nextLine();
                    int len = line.length();
                    total += len;
                    char[] line_c = line.toCharArray();
                    //System.out.println(line);
                    for (int j = 0; j < len; j++) {
                        for (int ii = 0; ii < 35;  ii++) {
                            if (line_c[j] ==  letters[ii] || line_c[j] ==  bletters[ii]) {
                                curr = ii;
                                break;
                            }
                        }
                        if (line_c[j] == "'".charAt(0) && prev < 33) curr = 33;
                        f1[curr]++;
                        f2[prev][curr]++;
                        //if ' is comming after space that is not apostrof
                        if (curr == 33 && prev > 32) curr = 34;
                        prev = curr;
                    }
                    i++;
                    //if (i>1000000) break;
                }
                // note that Scanner suppresses exceptions
                if (sc.ioException() != null) {
                    throw sc.ioException();
                }
            } finally {
                if (fstream != null) {
                    fstream.close();
                }
                if (sc != null) {
                    sc.close();
                }
            }
            FileWriter myWriter = new FileWriter("results.txt");
            
            myWriter.write("total: "+total+"\n");
            for (int i = 0; i < 35;  i++) {
                //System.out.println(letters[i]+"-"+bletters[i]+": "+f1[i]);
                myWriter.write(letters[i]+"-"+bletters[i]+": "+f1[i]+"\n");
            }
            for (int i = 0; i < 35;  i++) {
                for (int j = 0; j < 35; j++) {
                    //System.out.println(letters[i]+"-"+bletters[i]+": "+f1[i]);
                    myWriter.write(letters[i]+""+letters[j]+": "+f2[i][j]+"\n");
                }
            }
            myWriter.close();
        }catch (Exception e){//Catch exception if any
            System.err.println("Error: " + e.getMessage());
        }


    }
}

java Parser Bibliya_1369054606.txt

total: 3578675
а-А: 211077
б-Б: 54091
в-В: 170483
г-Г: 57867
ґ-Ґ: 1080
д-Д: 104972
е-Е: 126757
є-Є: 17491
ж-Ж: 23367
з-З: 58780
и-И: 178657
і-І: 179237
ї-Ї: 25475
й-Й: 41547
к-К: 73587
л-Л: 93010
м-М: 88977
н-Н: 161471
о-О: 286861
п-П: 73567
р-Р: 106416
с-С: 124620
т-Т: 123920
у-У: 89684
ф-Ф: 2270
х-Х: 38539
ц-Ц: 18099
ч-Ч: 28415
ш-Ш: 24069
щ-Щ: 17441
ь-Ь: 43199
ю-Ю: 22411
я-Я: 66785
'-': 2874
 - : 611263