/*
--------------------------------------------------
	 文字列の暗号化  Hairetu_04_angou
-------------------------------------------------
*/
import java.io.*;
class Hairetu_04_angou {
	public static void main(String[] args) throws Exception {
		
		char[] mae,ato;
		int mojicount,n,key;
		
		BufferedReader inp=new BufferedReader
			(new InputStreamReader(System.in));
		String keybd;

		System.out.print("文字列を入力してください-->");
		keybd=inp.readLine();
		
		mae=keybd.toCharArray();	//配列に文字を代入
		
		mojicount=mae.length;	//要素の個数を調べる
		
		System.out.print("\n文字数＝"+mojicount+"\n");
		
		ato=new char[mojicount];	//配列atoの生成

		System.out.print("暗号キーはいくつ(1〜25)？");
		keybd=inp.readLine();
		key=Integer.parseInt(keybd);
		
		for ( n=0 ; n<mojicount ; n++ ) {
			
			if ( (char)(mae[n] + key) > 'z' )  //'z'を越えたら'a'に戻す
				ato[n] = (char)(mae[n] + key - 26);
			else
				ato[n] = (char)(mae[n] + key);
		}
		
		keybd=new String(ato);	//配列atoから文字列を生成
		
		System.out.print("\n暗号化します　"+keybd+"\n");
		
	}
}