- #include <iostream> 
-   
- int main() { 
- 	unsigned char x1, x2;  
- 	scanf("%c", &x1);  
- 	x1 = ~x1;  
- 	printf("%x ", x1); 
- 	while (scanf("%c", &x2)) { 
- 		if (x2 == '\n') break;  
- 		x2 = x1 ^ x2;  
- 		printf("%x ", x2); 
- 		x1 = x2; 
- 	} 
- 	return 0; 
- } 
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