#include <stdio.h>
 
 #define MAXSTR 1000
 
 main()
 {
 	
 	char moji[26] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 	char s2[MAXSTR],s3[MAXSTR];
 	int i,j, no=0,num=0,num2=0,sa;
 	
 	while(no!=3){
 	fgets(s2, MAXSTR, stdin);
 	if(s2[0]== '-')
 			no = no + 1;
 	else
 	for(i=0; moji[i] != '\n'; i++){
 		if(moji[i] == s2[0]){
 			num = i;
 			break;
 		}
 	
 	}
 	
 	fgets(s2, MAXSTR, stdin);
 	if(s2[0]== '-')
 			no = no + 1;
 	else
 	for(i=0; moji[i] != '\n'; i++){
 		if(moji[i] == s2[0]){
 			num2 = i;
 			break;
 		}
 	
 	}
 	
 	sa = num2 - num;
 	//printf("%d",sa);
 
 		
 	    fgets(s3, MAXSTR, stdin);
 		if(s3[0]== '-')
 			no = no + 1;
 		
 		else
 	    for(i=0; s3[i]!='\n'; i++){
 		    printf("%c", s3[i]-sa);
 	    
 		}
 		putchar('\n');
 		if(no==3)break;
 	}
 
 	return(0);
 }