#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b>>c;
	if(a>b) swap(a,b);
	if(a>c) swap(a,c);
	if(b>c) swap(b,c);
	if(a+1==b&&c-1==b){
		cout<<"TRUE";
	}else{
		cout<<"FALSE";
	}
}
/**************************************************************
	Problem: 1041
	User: linzihang
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/