#include <iostream>

using namespace std;

int main()
{
    char a[] = "qwertyuiopasdfghjklzxcvbnm";
    char i;
    cin >> i;
    if (i == 'm')
        cout << "q";
    else
    {
    for (int k = 0; k < 24; ++k)
    {
        if (a[k] == i)
        {
            cout << a [k + 1];
        }
    }
    }
    return 0;
}