#include <bits/stdc++.h>
using namespace std;
int main()
{ int a,b,c,t;
cin>>a>>b>>c;
if(a<b){  t=b;
          b=a;
          a=t;
}
 if(a<c){ t=c;
          c=a;
          a=t;
}
 if(b<c){ t=b;
          b=c;
          c=t;  
}
 if(a-b==1&&b-c==1){
         cout<<"TRUE";
 }else{
         cout<<"FALSE";
 }
 
}
/**************************************************************
	Problem: 1041
	User: chenjiahui
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/