m = 51;
for i = 1:m

  year = 1959 + i;

  if ( i == 1 )
    s = 'C';
  else
    r = rand ( );
    if ( s == 'C' )
      if ( r < 0.30 )
        s = 'U';
      end
    elseif ( s == 'U' )
      if ( r < 0.10 )
        s = 'C';
      end
    end
  end

  fprintf ( '%c', s );

end

fprintf ( '\n' );
