#include <stdio.h>

int main(void) {
	char msg[5] = "azAZ";
	int key = 10;
	for(int i = 0; msg[i] != '\0'; i++) {
		char ch = msg[i];
    	if (ch >= 'a' && ch <= 'z'){
    	    ch = 'a' + (ch - 'a' + key) % 26;
	    } else if (ch >= 'A' && ch <= 'Z'){
    	    ch = 'A' + (ch - 'A' + key) % 26;
	    }
	    msg[i] = ch;
	}
	printf("%s\n", msg); // dcDC
	return 0;
}