#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

int main ()

{   char a[]="abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyza", s[256];
    int i;
    cin.get(s,256);
    for (i=0;s[i];i++)
        s[i] = a[2*(strchr(a, s[i])-strchr(a,'a')+1)];
    cout<<s;
    return 0;
}