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