#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,t;
	cin>>a>>b>>c;
	if(a<b) {t=a;a=b;b=t;}
	if(a<c) {t=a;a=c;c=t;}
	if(b<c) {t=b;b=c;c=t;}
	if((a-b==1)&&(b-c==1)) cout<<"TRUE";
	else cout<<"FALSE";
	return 0;
	}

/**************************************************************
	Problem: 1041
	User: ljl2
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/