#include <iostream>
#include <string>
using namespace std;
char decrypt(unsigned char sym) // 1000 0000
{
	//01001000 => 72  & | ^ >> << ~
	unsigned char first = 0xf0, second = 0x0f, F_left, F_right;
	first = sym >> 4; // 1000
	second &= sym; // 0000
	second = first ^ second; // 1000
	F_left = (first << 1) & 10;
	F_right = (first >> 1) & 5;
	first = F_left | F_right; // 0100
	return sym = (first << 4) | second;
}

unsigned char encrypt (unsigned char sym)
{
	//72 => 01001000 & | ^ >> << ~
	unsigned char first = 0xf0, second = 0x0f, F_left, F_right;
	first = sym >> 4; //0000 0100
	second &= sym; //0000 1000
	F_left = (first << 1) & 10; //0100 => 1000
	F_right = (first >> 1) & 5; // 0100 => 0100
	first = F_left | F_right; // 1000
	second ^= first; // 0000
	return sym = (first << 4) | second; // 1000 0000
}

int main()
{
	unsigned char str[] = "Hello world!";
	int i = 0;
	/*changesym(strok);*/
	while (str[i] != '\0')
	{
		str[i] = encrypt(str[i]);
		printf("%X ", str[i]);
		i++;
	}
	printf("\n");
	i = 0;
	while (str[i] != '\0')
	{
		str[i] = decrypt(str[i]);
		printf("%c", str[i]);
		i++;
	}


	/*printf("%s", strok);*/
	return 0;
}