# include <stdio.h>
int main()
{
	int n = 0;
	scanf("%d", &n);
	char b = getchar();
	char a[100] = "0", c;
	int i = 0;
	while ((b = getchar()) != '\n')
	{
		a[i] = c;
		i++;
	}
	int j = 0;
	for (j = 0;j < i;j++)
	{
		a[j] = a[j] + n;
	}
	for (j = 0;j < i;j++)
	{
		printf("%c", a[j]);
	}
	return 0;
}