#include<stdio.h>
int main(){
    
    int score;
    scanf("%d",&score);
    
    if(score>=50){
        printf("PASS");
    }
    else  (score<50) {
        
        printf("FAIL");
        
    }
    if  (score<0){
        
        printf("Invalid input");
    }
    return 0;
}