// Monika Dobrinova 8MI0600008
#include <iostream>
using namespace std;
const int ARR_SIZE = 30;
bool isLower(char c) {
    if (c >= 'a' && c <= 'z') {
        return true;
    }
    return false;
}
bool isUpper(char c) {
    if (c >= 'A' && c <= 'Z') {
        return true;
    }
    return false;
}
char ToUpper(char c) {
    if (isLower(c) == true) {
        return c - ('a' - 'A');
    }
    return c;
}
char ToLower(char c) {
    if (isUpper(c) == true)
    {
        return c + ('a' - 'A');
    }
    return c;
}
void my_strcpy(char* dest, const char* source)
{
    unsigned iter = 0;
    while (source[iter] != '\0')
    {
        dest[iter] = source[iter];
        iter++;
    }
    dest[iter] = '\0';
}
unsigned my_strlen(const char* str)
{
    unsigned length = 0;
    while (str[length] != '\0')
        length++;
    return length;
}
void Cipher(char str[]) {
    char res;
    int num = my_strlen(str);
    char buffer[ARR_SIZE];
    for (int i = 0; i < num; ++i)
    {
        if (isUpper(str[i]) == true)
        {
            res = ToLower(str[i]);
        }
        else if (isLower(str[i]) == true)
        {
            res = ToUpper(str[i]);
        }

        if ((res >= 'A' && res <= 'M')|| (res >= 'a' && res <= 'm')) {
            res += 13;
            buffer[i] = res;
        }
        else if ((res >= 'N' && 'Z' <= res)|| (res >= 'n' && 'z' <= res))
        {
            res -= 13;
            buffer[i] = res;
        }

    }
    my_strcpy(str, buffer);
    str[30] = '\0';
}

int main()
{
    char arr[ARR_SIZE];
    cin.getline(arr, ARR_SIZE-1);
    my_strlen(arr);
    Cipher(arr);
    for (size_t i = 0; i < 30; i++)
    {
        cout << arr[i];
    }
}