ROT13

#include <iostream>
using namespace std;

int main()
{
    char c;
    while(cin.get(c)&&c!='\n')
    {
        if(c==' ')
            cout<<' ';
        if((c>='a'&&c<='m')||(c>='A'&&c<='M'))
            cout<<(char)(c+13);
        if((c>='n'&&c<='z')||(c>='N'&&c<='Z'))
            cout<<(char)(c-13);
    }
    return 0;
}