C#Exams 4. Five Special Letters (on Java Code)

import java.util.Scanner;

public class _4_FiveSpecialLetters {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scan = new Scanner(System.in);
        int startNum = scan.nextInt();
        int endNum = scan.nextInt();

        boolean foundSpecialString = findAndPrintStringsOf5SpecialLetters(
                startNum, endNum);

        if (!foundSpecialString) {
            System.out.println("No");
        }
    }

    private static boolean findAndPrintStringsOf5SpecialLetters(int start,
            int end) {
        // TODO Auto-generated method stub
        boolean isFound = false;
        int i, j, k, l, m, totalWeight;
        for (i = 97; i < 102; i++) {
            for (j = 97; j < 102; j++) {
                for (k = 97; k < 102; k++) {
                    for (l = 97; l < 102; l++) {
                        for (m = 97; m < 102; m++) {
                            totalWeight = calculateTheWeightOfAll5Letters(i, j, k, l, m);
                            if (totalWeight >= start && totalWeight <= end) {
                                isFound = true;
                                printTheStringOf5SpecialLetters(i, j, k, l, m);
                            }
                        }
                    }
                }
            }
        }

        return isFound;
    }

    private static int calculateTheWeightOfAll5Letters(int let1, int let2, int let3,
                        int let4, int let5) {
        // TODO Auto-generated method stub
        int result = getWeightOfSingleLetter(let1);
        int counter = 1;
        if (let2 != let1) {
            counter++;
            result += counter * getWeightOfSingleLetter(let2);
        }

        if (let3 != let1 && let3 != let2) {
            counter++;
            result += counter * getWeightOfSingleLetter(let3);
        }

        if (let4 != let1 && let4 != let2 && let4 != let3) {
            counter++;
            result += counter * getWeightOfSingleLetter(let4);
        }

        if (let5 != let1 && let5 != let2 && let5 != let3 && let5 != let4) {
            counter++;
            result += counter * getWeightOfSingleLetter(let5);
        }

        return result;
    }

    private static int getWeightOfSingleLetter(int letter) {
        // TODO Auto-generated method stub
        switch (letter) {
        case 97:
            return 5;
        case 98:
            return -12;
        case 99:
            return 47;
        case 100:
            return 7;
        case 101:
            return -32;

        default:
            return 0;
        }
    }

    private static void printTheStringOf5SpecialLetters(int let1, int let2,
            int let3, int let4, int let5) {
        // TODO Auto-generated method stub
        StringBuilder specialStr = new StringBuilder();
        specialStr.append((char) let1).append((char) let2).append((char) let3)
                .append((char) let4).append((char) let5);

        System.out.print(specialStr + " ");

    }
}