#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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