#include <stdio.h>
#define LENGTH 1024

int main(void) {
    char s[LENGTH + 2], c;
    int i = 0, j;
    while ((c = getchar()) != EOF) {
        s[i] = c;
        i++;
    }
    for (j = 0; j < i; j++) {
        printf("%c", s[j] - ((j + 1) % 27));
    }
    printf("\n");


    return 0;
}