include <stdio.h>

int main() {

int a[10], t;
for (int i = 0; i < 10; i++) {
	a[i] = 0;
}
for (int i = 0; i < 5; i++) {
	scanf("%d", &t);
	a[t]++;
}
for (int i = 0; i < 10; i++) {
	if (a[i] == 0) {
		printf("%d ", i);
	}
}
return 0;

}