#include <iostream>
using namespace std;
const int TEN = 10;
int main() {
int n, firstDigit, secondDigit, thirdDigit;
cin >> n;
thirdDigit = n % TEN;
secondDigit = n / TEN % TEN;
firstDigit = n / TEN / TEN;
if (firstDigit == secondDigit - 1 && firstDigit == thirdDigit - 2) {
cout << "SUNT";
} else {
cout << "NU SUNT";
}
return 0;
}
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