#include<iostream>
#include<algorithm>
#include<math.h>
#define SIZE 265

using namespace std;

char s[SIZE];
char c[27];

int main()
{
	freopen("input.txt","r",stdin);
	freopen("output.txt","w",stdout);

	for(int i = 0; i < 10; i++)
		c[i] = char(i+'0');
	for(int i = 0; i < 27; i++)
		c[i+10] = char(i+'A');

	char val[27];
	for(int i = 0; i < 26; i++)
		val[i] = char(i+'a');
	val[26] = ' ';

	cin >> s;

	int n = strlen(s);

	for(int i = 0; i < n; i++)
	{
		int p = 0;

		while((c[p] != s[i]) && (p < 26))
			p++;

		int pos = (p-2-i)%27;
		if(pos < 0) pos += 27;
		cout << val[pos];
	}

	cout << "\n";
	return 0;
}