program main
	implicit none
    integer::d
    read(*,*) d
    if(d==25)then
    	write(*,*) 'Christmas'
    else if(d==24)then
    	write(*,*) 'Christmas Eve'
    else if(d==23)then
    	write(*,*) 'Christmas Eve Eve'
    else
    	write(*,*) 'Christmas Eve Eve Eve'
    end if
    stop
end program main