#include <iostream>
#include <algorithm>
using namespace std;

int main() {
    int a, b, c;
    cin >> a >> b >> c;
    int arr[3] = {a, b, c};
    sort(arr, arr + 3);
    if (arr[1] == arr[0] + 1 && arr[2] == arr[1] + 1) {
        cout << "TRUE";
    } else {
        cout << "FALSE";
    }
    return 0;
}    
/**************************************************************
	Problem: 1041
	User: fuyijun
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2076 kb
****************************************************************/