#include <unistd.h>
void func(void)
{
int i, j, k;
char digits[3];
i = 0;
while (i < 10)
{
j = 0;
while (j < 10)
{
k = 0;
while (k < 10)
{
digits[0] = i + 48;
digits[1] = j + 48;
digits[2] = k + 48;
if (i != j && i != k && j != k){
write(1, digits, 3);
write(1, "\n", 1);
}
k++;
}
j++;
}
i++;
}
}
int main() {
func();
return 0;
}
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