#include<iostream>

using namespace std;
int main()
{
	char key[100];

	while (cin >> key){

	for (int i = 0; i < sizeof(key); i++)
	{
		//if (key[i] == (int)" ")cout << "space";
		if ((int)key[i] <= 122 && (int)key[i] >= 97)
		key[i] = (int)key[i] - 1;
		if (key[i] == 96)key[i] = 122;
	}
	for (int i = 0; i < sizeof(key); i++)
		cout << key[i];
	}
	return 0;
}