city supplies for /OSR/

import java.util.Arrays;
import java.util.Random;

public class KeyMaker {
  private static char convertToChar(int ran)
  {
    if (ran == 0) {
      return '0';
    }
    if (ran == 1) {
      return '1';
    }
    if (ran == 2) {
      return '2';
    }
    if (ran == 3) {
      return '3';
    }
    if (ran == 4) {
      return '4';
    }
    if (ran == 5) {
      return '5';
    }
    if (ran == 6) {
      return '6';
    }
    if (ran == 7) {
      return '7';
    }
    if (ran == 8) {
      return '8';
    }
    if (ran == 9) {
      return '9';
    }
    if (ran == 10) {
      return 'A';
    }
    if (ran == 11) {
      return 'B';
    }
    if (ran == 12) {
      return 'C';
    }
    if (ran == 13) {
      return 'D';
    }
    if (ran == 14) {
      return 'E';
    }
    if (ran == 15) {
      return 'F';
    }
    if (ran == 16) {
      return 'G';
    }
    if (ran == 17) {
      return 'H';
    }
    if (ran == 18) {
      return 'I';
    }
    if (ran == 19) {
      return 'J';
    }
    if (ran == 20) {
      return 'K';
    }
    if (ran == 21) {
      return 'L';
    }
    if (ran == 22) {
      return 'M';
    }
    if (ran == 23) {
      return 'N';
    }
    if (ran == 24) {
      return 'O';
    }
    if (ran == 25) {
      return 'P';
    }
    if (ran == 26) {
      return 'Q';
    }
    if (ran == 27) {
      return 'R';
    }
    if (ran == 28) {
      return 'S';
    }
    if (ran == 29) {
      return 'T';
    }
    if (ran == 30) {
      return 'U';
    }
    if (ran == 31) {
      return 'V';
    }
    if (ran == 32) {
      return 'W';
    }
    if (ran == 33) {
      return 'X';
    }
    if (ran == 34) {
      return 'Y';
    }
    if (ran == 35) {
      return 'Z';
    }
    throw new IllegalArgumentException("Problem parsing key");
  }

  public static String genKey(String seed1, String seed2)
  {
    String s1 = "";
    for (int i = 0; i < 2; i++)
    {
      int ran = (int)(Math.random() * 36.0D);
      s1 = s1 + convertToChar(ran);
    }
    s1 = s1 + seed1;
    int value1 = 0;
    for (int i = 0; i < s1.length(); i++)
    {
      char c = s1.charAt(i);
      if ((c >= '0') && (c <= '9')) {
        value1 += c - '0';
      } else {
        value1 += c - 'A' + 10;
      }
    }
    String s2 = "";
    for (int i = 0; i < 2; i++)
    {
      int ran = (int)(Math.random() * 36.0D);
      s2 = s2 + convertToChar(ran);
    }
    s2 = s2 + seed2;
    int value2 = 0;
    for (int i = 0; i < s2.length(); i++)
    {
      char c = s2.charAt(i);
      if ((c >= '0') && (c <= '9')) {
        value2 += c - '0';
      } else {
        value2 += c - 'A' + 10;
      }
    }
    int checksum1 = value1 % 36;
    int checksum2 = value2 % 36;
    String s = convertToChar(checksum1) + s1 + "-" + convertToChar(checksum2) + s2;
    return s;
  }

  public static void main(String[] args) {
    Random rand = new Random();
    int r1 = rand.nextInt(36);
    int r2 = rand.nextInt(36);
    String c1 = "" + convertToChar(r1);
    String c2 = "" + convertToChar(r2);

    System.out.println(genKey(c1, c2));
  }
}