/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.stream.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println(caesarCipher("test", 3));
	}
 
	public static String caesarCipher(String cipher, int shiftAmount) {
	    return cipher.chars()
	    		.mapToObj(c -> "" + shift((char)c, shiftAmount))
	    		.collect(Collectors.joining());
	}
 
	private static char shift(char c, int amount) {
		char a = Character.isUpperCase(c) ? 'A' : 'a';
		return (char)((c - a + amount % 26 + 26) % 26 + a);
	}
}

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