4.0w+
社区成员
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class lianxi200_英文字母 {
static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
public static void main(String agrs[]) throws NumberFormatException, IOException {
int n = Integer.parseInt(br.readLine());
System.out.println((char) ('A'+n-1));
}
}