#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b>>c;
	if (b==a+1 && c==b+1 || c==a+1 && b==c+1){
		cout<<"TRUE"<<endl;
	}
	else {
		cout<<"FALSE"<<endl;
	}
	return 0;
}
/**************************************************************
	Problem: 1041
	User: xiaojingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/