#include<stdio.h>
#include<string.h>
#define S_LENGTH 2000

int main(){
	int i;
	char sent[S_LENGTH];
	scanf("%s",sent);
	for(i=1;i<=strlen(sent);i++){
		sent[i-1] = 'A'+(sent[i-1] + ('Z'-2*'A') - ((i-1) % ('Z'-'A'+1)))% ('Z'-'A'+1);
	}
	printf("%s\n",sent);
	return 0;
}