#include<stdio.h>   

int main(){ 
	int a,b,c;
	scanf("%d %d %d",&a,&b,&c);
	
	if(a < b){
		int t = a;
		a = b;
		b = t;
	}
	
	if(b < c){
		int t = b;
		b = c;
		c = t;
	}
	
	if(a < b){
		int t = a;
		a = b;
		b = t;
	}
	
	if(a - b == 1 && b - c == 1){
		printf("TRUE");
	}else{
		printf("FALSE");
	}

	return 0;
} 
/**************************************************************
	Problem: 1041
	User: admin
	Language: C
	Result: Accepted
	Time:20 ms
	Memory:1144 kb
****************************************************************/