UPPER DUBLIN INTERMEDIATE DIV
import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.StringTokenizer;

public class Encryption {

public static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

public int[] getValues() {

return values;

}

private int[] values;

private int a, b, c, d;

public Encryption(String q) {

getValues(q);

decode();

}

public void getValues(String input) {

input = input.replaceAll(" ", "");

StringTokenizer token = new StringTokenizer(input, ",");

int size = token.countTokens();

values = new int[size - 5];

int count = 0;

while (token.hasMoreTokens()) {

if (count > 0 && count < size - 4)

values[count - 1] = Integer.parseInt(token.nextToken());

else if (count == 0) {

token.nextToken();

} else if (count > size - 5) {

a = Integer.parseInt(token.nextToken());

b = Integer.parseInt(token.nextToken());

c = Integer.parseInt(token.nextToken());

d = Integer.parseInt(token.nextToken());

}

count++;

}

}

public void decode() {

int length = values.length / 2;

int[] decoded = new int[values.length];

int invD = a * d - b * c;

for (int i = 0; i < length; i++) {

int x = values[i];

int y = values[i + length];

decoded[2 * i] = (x * d - y * b) / invD;

decoded[2 * i + 1] = (-x * c + y * a) / invD;

}

values = decoded;

}

public static void main(String[] args) {

String c;

for (int i = 0; i < 5; i++) {

try {

System.out.println((i + 1) + ".");

c = br.readLine();

Encryption k = new Encryption(c);

for (int z : k.getValues()) {

z = ((z % 27) + 27) % 27;

if (z != 0) {

System.out.print((char) (z + 64));

} else

System.out.print(" ");

}

} catch (IOException e) {

e.printStackTrace();

i--;

}

System.out.println();

}

}

}