#include <string>
#include <iostream.h>

using namespace std;

string example(char a);

int main()
{
	string s;
	cin>>s;
	for (int i=0; i<s.length(); i++)
	{
		cout << s[i] << ":" << example(s[i]) << endl;
	}
}

string example(char c){
    /*restart*/
	static int QS=0;

switch(QS){case 0:goto Q0; case 1:goto Q1; case 2:goto Q2; case 3:goto Q3;
case 4:goto Q4; }

	Q0:
	while(true){
	  if( c == 'a' )
	  	{QS=1; return("odd a"); Q1:; }
	  else {QS=2; return("not an a"); Q2:; }

	  if( c == 'a' )
		{QS=3; return( "even a" ); Q3:; }
	  else { QS=4; return("not an a"); Q4:; }
	}
}