#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+1==b&&b+1==c) cout<<"TRUE";
	else cout<<"FALSE";
	
}
  
/**************************************************************
	Problem: 1041
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:54 ms
	Memory:2072 kb
****************************************************************/