#include<bits/stdc++.h>
using namespace std;
int a[5],s;
int main(){
    for(int i=1;i<=3;i++) cin>>a[i];
    sort(a+1,a+4);
    if(a[1]+1==a[2]&&a[2]+1==a[3]) cout<<"TRUE";
    else cout<<"FALSE";
    return 0;
}
/**************************************************************
	Problem: 1041
	User: wangchenyu
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2076 kb
****************************************************************/