#include<stdio.h>

void main(){
	int i,g,s;
	
	for(i=10;i<=99;i++){
		g=i%10;
		s=i/10; 
		if(g<s&&(g+s)%2==0){
			printf("%d\n",i);
		}
	}
}
/**************************************************************
	Problem: 1711
	User: admin
	Language: C
	Result: Runtime Error
****************************************************************/