#include <bits/stdc++.h>
using namespace std;
int main(){
    int i[3];
    cin>>i[0]>>i[1]>>i[2];
    sort(i,i+3);
    if(i[0]+1==i[1]&&i[1]+1==i[2])cout<<"TRUE";
    else cout<<"FALSE";
    return 0;
}
/**************************************************************
	Problem: 1041
	User: suzihang
	Language: C++
	Result: Accepted
	Time:22 ms
	Memory:2076 kb
****************************************************************/