#include <stdio.h>

    int main(void) {
    	int reverse = 0;
    	int k;
    	for(k = 10;k<=100;k++){
    	while(k!=0){

    		reverse = reverse*10;
    		reverse = reverse + k%10;
    		k = k/10;


    	}
    	if((k*k)==(reverse*reverse)){
    		printf("%d/n", k);
    	}



    }
    return 0;
    }