#include <iostream>
using namespace std;
int main()
{
	int a,b,c,t;
	cin >> a>>b>>c;
	if(a<b)
	{
		t = a;
		a = b;
		b = t;
	}
	if (b<c)
	{
		t = b;
		b = c;
		c = t;
	}
	if (a<b)
	{
		t = a;
		a = b;
		b = t;
	}
	if (a-1==b && b-1==c)
	{
		cout << "TRUE";
	}
	else
	{
		cout << "FALSE";
	}
}
/**************************************************************
	Problem: 1041
	User: xiaomingze
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/