function Main(input){
	x = 'Christmas'+' Eve'+' Eve'+' Eve';
  	y = x.split(' ');
   	if(input == 22){
    console.log(y[0]+' '+y[1]+' '+y[2]+' '+y[3]);
    }else if(input == 23){
    console.log(y[0]+' '+y[1]+' '+y[2]);
    }else if(input == 24){
    console.log(y[0]+' '+y[1]);
    }else if(input == 25){
    console.log(y[0]);
    }
}
Main(require("fs").readFileSync("/dev/stdin","utf8"));