#include <iostream>
using namespace std;
int main() {
char c;
long long x;
cin >> c >> x;
int p = (c - 'a' - (x % -26) - 26) % -26;
p = -25 - p;
p = (p + (x % -26)) % -26;
char r = 'a' + p;
cout << r << endl;
return 0;
}
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