#include<stdio.h>

int main(){
	unsigned a_key = 56712345;
	unsigned b_key = 987654321;
	unsigned secret = 153;
	printf("secret:  %u\n", secret);

	unsigned enc_a = secret ^ a_key;
	printf("enc_a = %u\n", enc_a);

	unsigned enc_ab = enc_a ^ b_key;
	printf("enc_ab = %u\n", enc_ab);

	unsigned enc_b = enc_ab ^ a_key;
	printf("enc_b = %u\n", enc_b);

	unsigned dec = enc_b ^ b_key;
	printf("Decrypted secret:  %u\n", dec);

	return 0;
}