#include <stdio.h>
#include <stdlib.h>

const int maxsize = 33;
char line[maxsize+1];
char ans[maxsize+1];
FILE * file;

void copying() {
    for (int i = 0; i < maxsize; ++i) {
        ans[i] = line[i];
    }
}

void decryption() {
    for (int i = 0; i < maxsize; i+=1, ans[i] = (ans[i] ^ '^'-'|'+'&') - i) {
    }
}

int main(int argc, char * argv[]) {
    file = fopen("flag.enc", "r");
    if (file == NULL)
        printf("File does not exist!\n");
    else {
        fgets(line, maxsize+1, file);
        copying();
        decryption();
        printf("%s\n", ans);
        fclose(file);
    }   
    return 0;
}