C :

#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);
		}
	}
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
   int a,b,i = 10;
   while(i <= 99){
   	   a = i / 10;
   	   b = i % 10;
   	   if(a > b && (a + b) % 2 == 0){
   	      cout<<i<<endl;	
	   }
   	   i++;
   }
}

Pascal :

var 
  //s:ansistring;
  i,count,s,g:longint;
begin
  for s:=1 to 9 do
    for g:=0 to s-1 do if (s+g) mod 2=0 then writeln(s,g);
end.

Java :

public class Main {
	 public static void main(String[] args) {
		for(int i = 10;i<100;i++){
			int a = i % 10;
			int b = i / 10;
			int c = a + b;
			if(b > a && c % 2==0){
				System.out.println(i);
			}
		}
	}
}

Python :

for i in range(10, 100):
    sw = i // 10 % 10
    gw = i // 1 % 10
    if sw > gw and (sw + gw) % 2 == 0:
        print(i)