#include<bits/stdc++.h>
using namespace std;
int main(){
	int nums[3];
	cin>>nums[0]>>nums[1]>>nums[2];
	sort(nums,nums+3);
	if (nums[1]==nums[0]+1 && nums[2]==nums[1]+1){
		cout<<"TRUE"<<endl;
	}
	else {
		cout<<"FALSE"<<endl;
	}
	return 0;
}
/**************************************************************
	Problem: 1041
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2076 kb
****************************************************************/