#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: Compile Error
****************************************************************/